Sodium-ion batteries have started to appear in cars and home storage

https://cleantechnica.com/2025/10/22/the-sodium-ion-battery-revolution-has-started/

by xbmcuser • 9 months ago

166 158 9 months ago

brybell• 9 months ago

Very interesting. I've been thinking for the past few years that new battery technology is really what will be the catalyst for the next generation of technology across all industries. I'm curious about their use in smaller consumer electronics, or if lithium will still be the standard for many more years to come.

dwd3• 9 months ago

Ideally they will be used in personal electronics as sodium chloride solid state (SCSS) batteries are far safer and not going to explode or cause a run-away fire.

They also don't need some "critical" minerals such as graphite, cobalt and nickel.

fart-fart-FART• 9 months ago

graphite is rather abundant and easily synthesized, is it not?

hoistbypetard2• 9 months ago

I hope it's on the way, but I don't think the Pioneer Na is yet a sign of this revolution. This detailed review didn't leave me in a hurry to go get one, anyway:

https://www.youtube.com/watch?v=OoZ_g_MShTw

cyberax• 9 months ago

The idea is not that Na-Ion batteries are better than LFPs, they are not. The main goal is to make them dirt cheap.

It seems that $15 per kWh of storage should be achievable with them. At this price, it's trivial to install enough grid-scale storage to completely move off fossil fuels in more southern areas.

dzhiurgis9• 9 months ago

They are better in cold and have higher charge rates. Eventually (10-20years) they’ll be cheaper than LFP. All while 15% lower volumetric density.

mycall• 9 months ago

Na-Ion batteries are better than LFPs when considered the temperature range between 0C and 0f. In this [0] review, prof hobo demonstrates this is the only reason to by Na-Ion (right now).

[0] https://www.youtube.com/watch?v=OoZ_g_MShTw

tonyedgecombe2• 9 months ago

The $15/kWh is misleading as it's only the cost of the raw materials.

jxf• 9 months ago

The idea with really cheap batteries is that they don't need good energy density. You just swap them every so often and put the one you aren't using in the charging rack. You could even carry your own reserve energy with you!

TrainedMonkey• 9 months ago

We used to have swappable batteries in virtually all of portable electronics. You could even get them in a rechargeable accumulator format. Virtually all of portable electronics has integrated batteries.

llm_nerd• 9 months ago

Actually came across this video independently a couple of days ago, and having never come across this gentleman before it was enough to convince me that his analysis is of negligible value of the "beg the conclusion" variety.

To wit, in his review he-

-dismisses environmental concerns with Li

-dismisses safety concerns with Li

-dismissed geopolitical concerns with Li availability. Something something "environmentalists!" (shakes fist at clouds) like with the environmental concerns.

-dismisses economic advances of Na

And then the overwhelming focus of his review is that if you deep freeze the battery, it charges slowly. This becomes the foundation of his criticism. Only firstly it's a self solving issue -- the battery warms as it charges -- but in most situations the battery will be in a heated (or will be self-heating) scenario and at an ideal temperature.

I'm no Na booster, and it seems like an incremental improvement in various dimensions for certain scenarios, but that video adds extraordinarily little value to the space.

hoistbypetard2• 9 months ago

I disagree with your conclusion about the video even as I think Na is an incremental improvement. I think the video hits solidly on why the Bluetti Na Pro product is not yet a good overall product. I still think it's promising (and I think the reviewer does too). I can see why you think he's dismissing environmental/safety/geopolitical concerns. But I don't think so; I think he's simply taking the perspective of what's the best product for someone who needs to live with this as a primary power pack that they use. Obviously, someone could weigh the concerns that you mention higher than the functionality of the power pack. But reviewing it in the context of performance doesn't equate to a dismissal of those, IMO.

AnonC• 9 months ago

I skimmed through the article. It talks a lot about sodium ion batteries and how major vehicle and transportation companies are getting into making and using these batteries. It also talks about the cost aspect, with sodium ion being cheaper than lithium iron phosphate (LFP) batteries.

However, there is no mention of this technology in consumer devices and gadgets like laptops, smartphones and tablets. I get that the site is about clean technology as a replacement for the currently more polluting technology. But I’m interested to see when these sodium ion batteries will appear in phones and laptops and what difference they may make to the cost, price, weight, performance, safety, longevity, etc.

chris_va• 9 months ago

Well, because they probably never will.

Phones and laptops are weight/volume sensitive, and sodium ions are a lot larger than lithium ions, thus the battery energy density is lower.

someonenice• 9 months ago

Increased usage of Sodium batteries for static applications (home storage) could reduce demand for Li based batteries. This could reduce the cost of Laptop batteries.

jostmey• 9 months ago

Phone and laptop batteries probably make up a tiny fraction of the battery market. My EV battery is almost 5000 times the size of my iphone.

Sodium batteries, if the technology works, would replace EV batteries and provide support to the electrical grid, and would be purchased at thousands of times the volume of iphone ad laptop batteries

grumbelbart2• 9 months ago

Since their energy density is still lower, it will probably take a while for them to be adapted in EVs.

But their impact on energy storage to stabilize the grid, both technically and in terms of prices, can not be overstated. Cheap, safe storage is the key component missing in Europe for using more renewables. Without that you need to keep gas plants in reserve, should there be a few days without sun and wind.

There were a few such days in December 2024, and their impact onto energy prices is difficult for energy-intense industries. https://energy-charts.info/charts/price_average/chart.htm?l=...

hn_throwaway_99• 9 months ago

As another comment mentioned, sodium ion batteries compete very poorly against lithium when portability is paramount.

But more on that point, it always struck me as bizarre that lithium was dominant in so many areas despite vastly different requirements. For home and grid storage, battery weight is almost immaterial, while it's a paramount concern in portable devices. I think it would be very surprising indeed if one chemistry performed best in all scenarios. Lithium became dominant primarily because it had so much research and supply chain maturity behind it, even if it was suboptimal for areas like grid storage. Glad to see other battery chemistries are getting more investment.

fulafel2• 9 months ago

Lots of laptops and tablet models could spare more volume and weight for batteries if there was a big cost advantage.

lambdaone3• 9 months ago

You may see a mixture of sodium and lithium batteries in grid storage; one for providing very short-term grid stabilization of the order of seconds to minutes, the other for long-term large-scale storage, which is by far the largest application. Possibly both within the same battery farm.

adgjlsfhk13• 9 months ago

the point of sodium batteries is that for stationary applications (e.g. ups/house backup), we've been using scaled up cell phone batteries for the last decade because the tech space was doing all the r&d. now that we know how good batteries can be, every important niche is getting it's own billions of dollars spent to find the perfect battery for that application

danans2• 9 months ago

for stationary applications (e.g. ups/house backup), we've been using scaled up cell phone batteries for the last decade

That's just the old Powerwall. Most home backup batteries for the last 5 years have been LFP, not Li-ion. I think even Tesla uses LFP in Powerwalls now.

specialist• 9 months ago

Opportunity is for (stationary) appliances, rather than devices.

For instance startup Channing Street Copper's battery powered induction stove. Their battery is large enough to also power your refrigerator for 3 days (IIRC).

In effect, a combination Powerwall and stove. Without requiring a panel upgrade. Apartment dwellers can cost effectively electrify All The Things. It greatly improves resiliency. Unlocks distributed grid power generation and storage (IIRC something like "VPP" for "virtual power plant").

"Induction stoves with batteries built in, and why they matter" [2022]

https://www.volts.wtf/p/induction-stoves-with-batteries-buil...

labrador2• 9 months ago

It seems clear that na-ion batteries will replace large scale grid storage especially in cold climates. This isn't another hyped up battery.

adgjlsfhk13• 9 months ago

I don't think cold climates will be that different here. grid scale storage doesn't care about outside temp because heating/cooling a warehouse is pretty cheap

hyperadvanced2• 9 months ago

A lot of BESS enclosures (sub grid scale, and grid scale) are much more primitive than a warehouse. If you don’t need to pay for HVAC, it’s free money for the operator.

mmooss• 9 months ago

Heating and cooling is pretty energy-intensive, which comes right out of the marginal profit of owning batteries. They might as well hook up the heating/cooling system to the batteries.

sschueller• 9 months ago

IMO, for large scale, nothing beats pumped water storage if you have the right conditions for the required lake. No risk of a bad cell causing a fire, no chemical degradation, no cooling or heating required and zero to full power within seconds just like a battery.

fooker• 9 months ago

One of the few pumped hydro facilities in the US had a catastrophic flood

labrador2• 9 months ago

I should have been more clear. I'm saying sodium ion will be chosen when litium ion otherwise would have. We have a large battery at Moss Landing CA where I live. When those batteries need replacing, I'd bet they'll use sodium ion.

_carbyau_2• 9 months ago

Sure. But batteries are needed for "more" and "location".

If a sodium battery is heavy and bigger but used for gridscale then that'll work fine.

pjc503• 9 months ago

if you have the right conditions for the required lake.

Yes, but you don't. Those conditions are really scarce. And in the UK they're all either nature reserves or already used for this purpose.

jillesvangurp4• 9 months ago

To add some meat to that correct statement:

CATL is launching volume production of their second generation sodium ion battery in December 2025. That's in about 2 months. I'm sure they'll use most of next year to ramp up production but they are targeting multiple gwh of production capacity with this first factory. More will likely follow. Apparently converting existing LFP production to this is relatively easy. This is not some experimental thing but a completely validated and ready for mass production chemistry.

Some basic stats of their cell: 175 wh/kg, ~10K charge cycles, -40 to +70 degrees celsius operating range, 5C charge rate (very fast basically). That's basically very competitive with LFP for both storage and low end EVs (up to 500km/300miles is a number they've cited).

That is all straight from CATL's recent press release on this. They are either playing some really amazing poker game here or they really are about to massively change things in the market.

That temperature range means these batteries can operate pretty much anywhere on this planet.

Peak Energy is actually starting to produce low volume production for their unique chemistry for grid storage. Their pitch is basically that they can deploy these in the desert with passive cooling only. No fans or moving parts. No cooling liquids. Nothing. Apparently this should work fine in a desert where it's freezing cold at night and blisteringly hot during the day. No fire risk. No mechanical parts that can break. Basically plonk them down and forget about them. Of course highly uncertain if they can scale all the way but it sounds promising.

There are other companies with production plans (or actual production happening) on this front as well.

Sodium ion has definitely left the labs now and it's now a matter of time before either these batteries are mass produced and widely used or something even better comes along to displace this. My guess is sodium ion will eat significantly into LFP market share for both storage and automotive in the next five years or so. After that, I would be very disappointed if nothing better comes along. Five years is about the same time it took for LFP to make a big dent into NMC market share. It might be some time before these things start showing up in the US though because of the tariff situation and the lack of local production capacity for this new chemistry. But if it is successful elsewhere, it will eventually happen there as well.

The biggest feature of this chemistry is actually the low cost of the materials. There are no exotic metals that you need. Everything needed can be sourced cheaply and locally in abbundance in pretty much every country. There have been some persistent rumors that CATL is targeting a long term cost of this chemistry of around 10$/kwh starting at maybe between 30 and 50$. 10$ is almost 10x lower than what is common today. Most EVs only have about 500-700$ worth of battery at those prices. As opposed to 5-7K right now. And many manufacturers don't produce their own cells so they would be paying more.

The cost is basically why people are a bit bullish on this technology. The low cost is a really big deal. It changes everything.

energy1234• 9 months ago

Thanks for this. 10$/kWh would be insane as an aspirational number but are these manufacturer costs or grid scale buyer costs or retail costs for end user in EVs/homes? To make it more specific, what % drop in per-kwh costs for grid scale storage should energy developers expect to see over the next 2-3 years due to sodium ion? Trying to nail down a best-guess percentage drop to get a feel for how big this is going to be.

scarab92• 9 months ago

What makes sodium-ion batteries so much cheaper than LFP batteries?

Isn’t lithium only about 15% of the cost of an LFP cell to begin with?

pbmonster• 9 months ago

Cold climate isn't the interesting niche for the beginnings of grid scale Na batteries - hot climates are.

If you put LFP batteries packed into a cargo container next to a solar farm in California or Nevada, a significant portion of that container will be piping (to every cell) and compressors for a beefy AC system. LFP cells don't like to work hot.

This cooling system will take up a significant portion of space, power, and worst of all, of the total maintenance cost of the entire battery system.

An identical system made of Na batteries will take 2 containers, but need no cooling power and basically no maintenance - no moving parts, unlike the compressors and fans of the LFP pack.

tedk-42• 9 months ago

Where are all the commenters about how China can't innovate and they can only steal technology now...

Reverse that, why don't other countries / companies try and steal their talent and IP? Is everyone resigned to think that China are undefeatable on the technology/manufacturing of these batteries?

jabl• 9 months ago

China has by this point large advantages in industrial ecosystems and modest cost labor, and that the state is willing to make large long-term bets on technologies it sees as important in the future.

It's not insurmountable for 'the West' to claw back some of that manufacturing, including high-tech items like batteries. It will take a large, long-time and very expensive effort, however. But talk is cheap, and largely 'the West' has drunken the neoliberalism kool-aid and is staring at quarterly shareholder value so little gets done.

Heck, some Western government are even in bed with the fossil fuel industry, desperately trying to hold back progress in order to claw a bit more profit out of the industry before the full force of the electric revolution hits.

formerly_proven2• 9 months ago

But talk is cheap, and largely 'the West' has drunken the neoliberalism kool-aid and is staring at quarterly shareholder value so little gets done.

The west is mostly drunk on populism, nativism and boomer welfare. If it were the neoliberal hellscape you imagine, it'd at least be competitive.

dyauspitr• 9 months ago

Populism and anti immigrant sentiment will kill all progress in the west.

Propelloni• 9 months ago

It used to be the case that the USA was very successfull in making the talent (from everywhere, not just China) "steal" itself to the USA.

I have heard that the USA has abandoned that strategy recently, but I think it is too early to see any impact.

_carbyau_2• 9 months ago

I would criticize the USA's strategies in this regard but it seems that might put me in the crosshairs of their strategies...

dwd3• 9 months ago

The sodium ion battery was invented over 200 years ago. No one needs to steal the technology, and manufacturing is basically the same.

All the research is in finding ever better combinations of anode/cathode.

Lithium mining and processing is dominated by Western countries, which is why China is incentivised to develop and manufacture sodium ion batteries. They know the game and haven't ignored it, unlike the West who ignored the geopolitical risk of China dominating rare earth processing for 20+ years.

The West should have a similar incentive despite having most of the lithium, namely supply risks for graphite, cobalt and nickel. There is a lot of research going on but mostly in Europe.

formerly_proven2• 9 months ago

The sodium ion battery was invented over 200 years ago.

Citation needed

All the research is in finding ever better combinations of anode/cathode.

Trivial matter then.

energy1234• 9 months ago

Some innovations are intimately coupled with scale through the learning rate and cannot be ported from one country to another.

ZeroGravitas2• 9 months ago

The anti-China story on Sodium batteries used to be that the evil Chinese had monopolised all the lithium that the rest of the world mines and then ships to them for processing and turning into batteries.

So American companies would develop sodium instead and break this market wide open.

But the Chinese appear to have beat them to it.

Yeul• 9 months ago

It's not really the innovation part. The Chinese actually put research into mass production.

At some point when Americans were still denying climate change the CCP looked at the massive environmental destruction around them and decided to do something about it.

tonyhart7• 9 months ago

Hope the economic of scale picked up and we would get 10% price of vehicle as battery cost

LikeBeans• 9 months ago

For my EV, which I charge about once a week on average, with 4,000 cycles that means about 77 years!! That's a huge deal. CATL quoted 10k cycle battery too. Wow. Very cool. Yeah energy density and operating profile and all that. But color me impressed.

tirant• 9 months ago

It’s not only about longevity in time but also in terms of miles.

For heavy users and given a standard range of 250+ miles, we are talking about a longevity of 1 000 000 miles. I never had a car with more than 200.000km (120 000 miles).

esseph2• 9 months ago

I've never had a car with less than 120,000 miles.

swiftcoder• 9 months ago

If you look through second-hand car listings in Europe, >400,000km is not that usual to see. In places where cars are relatively expensive, folks keep them running forever...

That said, a million miles is probably enough for anyone :D

pjc503• 9 months ago

There was a Korean guy who drove an Ioniq, on its original battery, over 660,000km. Basically going up and down the country every day for work.

president_zippy• 9 months ago

Are there any better sources we should read for how and why sodium-ion batteries are better than lithium-ion batteries?

All I know is that the charge to mass ratio of an Na+ ion is less than that of an Li+ ion, and that elemental Na and Li are both highly-reactive with violent exothermic reactions when exposed to water. I need someone with chemistry or materials science experience to help me explain what the advantages are and how those advantages exist.

adrianN3• 9 months ago

https://en.wikipedia.org/wiki/Sodium-ion_battery#Comparison Has an overview

duskwuff• 9 months ago

The important bit is that sodium is much cheaper than lithium, and that translates into the batteries being less expensive per watt-hour. They're larger and heavier for the same capacity, but the lower price makes up for it, especially in grid-scale storage (where size/weight is nearly irrelevant).

ViewTrick10023• 9 months ago

They aren’t better.

The allure is cheaper input materials, potentially very long lifespans and creating a hedge against the boom and bust cycle of the lithium market.

toast0• 9 months ago

Cheaper and longer lifespan is certainly better for some applications. Less charge density by weight and volume is not better, but may be an acceptable tradeoff.

danans2• 9 months ago

They aren’t better.
The allure is cheaper ...

When it comes to grid energy storage, cheaper (while also safe and performant) is better, don't you think?

jillesvangurp4• 9 months ago

Lower cost, safer, longer cycle times, better operating temperature ranges, etc. They are better in many ways. People obsess about energy density but that's not the only thing that is important. On that front the lower energy density is offset by the reduced need for costly and weighty cooling and safety mitigation.

For example NMC and LFP usually require complex cooling solutions with cooling liquids, heat pumps, hoses, etc. Peak Energy is planning to deploy a passively cooled battery in deserts. No protection from the elements. Freezing cold at night. Blazing sun during the day. Cooling solutions with all their mechanical components are the single most likely thing to fail and cause issues for storage solutions. Skipping that is a big reliability win and it reduces cost as well.

briandw• 9 months ago

Have a look at The Limiting Factor episode "The Hype and Reality of Sodium Ion Batteries" https://youtu.be/KjiqqafD_0w?si=txe6eODkSiasSylg

It's really well done and digs into all the details on sodium-ion. Lots to like with sodium-ion (charge rate for one) but cost isn't going to be competitive for at least 5 and more likely 10 years.

CraigJPerry• 9 months ago

Haven't watched the episode but the comment about price seems incorrect - CATL announced its pricing at $40 per kwh and said $19 is their target in future, which compares with $65 per kwh today for their li-ion

jillesvangurp4• 9 months ago

They also announced that CATL is starting mass production this December. The long term cost target might be closer to 10$/kwh. That's an unconfirmed rumor that has been circulating that is plausible based on material cost and other factors.

The bottom line is, mass production is starting soon at cost levels that are probably undercutting LFP from day 1. CATL is explicitly targeting use for low end EVs. IMHO this chemistry is also a good match for things like trucks given the long battery lifetime and good enough energy density. Perfect for frequent rapid charging and intensive use in long range trucks.

bmicraft4• 9 months ago

Do you have a source for the $40/kWh? I can't find anything but unsubstantiated speculation surrounding the price.

karlkloss• 9 months ago

I bought 18650 sodium-ion batteries last year. Price is about the same as lithium-ion in small quantities, capacity is about half.

But this is currently small batches backyard production, so I expect the prices to go down. Also, the materials are available practically everywhere, so even 3rd world countries should be able to make them.

ThePowerOfFuet• 9 months ago

Here's that YouTube link without the tracking: https://youtu.be/KjiqqafD_0w

tim3336• 9 months ago

That video seems over pessimistic to me. It has "sodium ion battery cells don't have a good chance of reaching parity with LFP cells until about 2039" but BYD who are making the things are talking about next year.

I could see quite a rapid takeoff if they prove successful next year after being mass produced because they look like maybe the best solution for grid storage.

metalman• 9 months ago

That the worlds largest battery manufacturers have gone ahead with building gigawatt production plants is basicly the wake up call. They have done this based on real world deploymemt of electric cars in multiple markets over the last 3 years and of course for the main use as storage and buffering batteries, which will then allow for the full electrification of the transport sector, without putting undue strain on the,(thier) grid. this has further impact as energy costs will drop significantly, while noise and pollution also decrease dramaticaly,while increasing saftey and reiability. any country holding back is seriously fucked.

dzhiurgis9• 9 months ago

Your personal use is drop in the ocean with how much power AI will require (10GW of datacenters already planned, multiply this by 100-1000x for next 100 yrs)

ZeroGravitas2• 9 months ago

A parallel worth bearing in mind is that LFP batteries became super popular over the last few years and are now 50% of all EV batteries worldwide, but are still rare in the US.

This is partly because the US is a richer market with higher end desires but it might mislead people in that geography into thinking that the battery mass manufacturing world moves slowly.

Meanwhile in the storage market it's gone to 90% LFP as the big deployments take advantage of the cost reductions available.

In fact the biggest impediment to sodium being rolled out was continuing reductions in LFP cost which made people less enhusiastic for alternatives.

It appears they've managed to drive costs down even further, prompting its graduation into mass scale manufacture.

IlikeKitties2• 9 months ago

I'd prefer LFP Batteries anyway. Much more stable chemistry in regards. Higher Cycle Life, Higher Temperature Stability and they are significantly less likely to blow up or catch fire in an accident. Their only disadvantage is energy density.

alphabetag675• 9 months ago

Sodium batteries are much better for environment. Sodium is everywhere.

Jedd• 9 months ago

If safety is a concern, why not flow storage?

I see enough reports of Li battery related unpleasantness to be slightly concerned on this front, and for fixed location storage I'm less concerned with density and more so with maintenance and life span.

TFA talks about (favourable) temperature tolerance of Na, at least at the low end, I didn't see high end figures.

tonyedgecombe2• 9 months ago

I do wonder if you could get away with abusing an LFP battery in a way you wouldn't with NMC. If you don't have to worry about running it down so much then perhaps that makes up for the lower capacity.

PaulKeeble2• 9 months ago

Sodium Ion is expected to be quite a bit better on cycle life in the end once its matured, they think it could go 20k or more cycles compared to LFPs 6k.

ghtbircshotbe• 9 months ago

I was under the impression that lfp didn't work in cold temperatures, which is a problem if you want to keep it in a shed so it doesn't burn your house down.

scotty79• 9 months ago

LFP = LiFePO4

qnleigh2• 9 months ago

If sodium batteries are so much cheaper, why is the emphasis of this article on batteries for trucks and not grid-scale storage? Isn't the latter much more impactful?

Also naively I would expect sodium batteries to be heavier that lithium, which would make them worse for transportation but still fine for energy storage.

perlgeek• 9 months ago

Probably familiarity bias; the author has more contact with EVs and/or expect the reader to have more contact with them.

PaulKeeble2• 9 months ago

I haven't seen any inverters for grid purposes for the wide Voltage range that Sodium produces. It may be the inverter organisations haven't got their yet and are waiting for the batteries to be available and cheap before it makes sense.

I think a lot of households will choose Sodium just because of how cheap it will be but not until there is the basic inverter equipment to make use of it from the usual manufacturers.

tim3336• 9 months ago

They haven't produced many yet. And when they do they'll probably sell them for applications where they can charge most and make profits. The Pioneer Na(sodium) portable power station thing in the article isn't cheap. The grid storage will come when production ramps up.

lambdaone3• 9 months ago

I can't stress enough how big a development this is in the process of making renewable energy not just the cheapest form of power, but one of the most reliable, something that will drive decarbonization in general, which will in turn drive world politics.

megaman8212• 9 months ago

People are over excited about sodium-ion batteries. They are at least years away from price parity. The super-low numbers floating around are absolute fantasy until production is in the tens of gigawatt hours at least. Their real value is being a hedge on lithium prices. If large battery manufacturer can trivially reconfigure their lines to make sodium-ion batteries, that will be a giant check on large lithium price spikes.

tim3336• 9 months ago

CATL has announced battery pricing at the cell level in volume at $19/kWh.

Sounds price competitive already?

megaman8212• 9 months ago

Not until they actually make them "in volume". They could be ramping up volumes for years and years until they hit that price. When they start producing them, I would bet anything the initial run will not be $19/kWh.

insane_dreamer• 9 months ago

Given the advantages of NaIon batteries over LFPs or NMC, why aren't we already seeing them in EVs (other than some test runs in China)? Is it that companies have already invested too much in the LFP or NMC process? It would seem switching to NaIon would be an easy decision.

zackmorris2• 9 months ago

I just heard about this post, so did a quick search and currently it looks like Sriko is the only company providing affordable sodium-ion batteries. They appear to be within about half the energy density of lithium-ion batteries. I used AI (first Google then Bing because it has ChatGPT 5) to create tables comparing battery types:

  A($/Wh) D(Wh/kg) D(Wh/L) P($)  E(Wh) M(kg) Vol(L) V(V) C    S     URL(Sodium-ion)
  0.46    97.50    235.79  1.81  3.9   0.04  0.017  3.0  3000 18650 https://srikobatteries.com/product/sodium-ion-18650-3-0v-1-3ah-3-90wh-20c-rechargeable-battery/
  0.34    114.29   258.31  3.23  9.6   0.084 0.037  3.0  3000 26700 https://srikobatteries.com/product/sodium-ion-26700-3-0v-3-2ah-9-60wh-3c-rechargeable-battery/
  0.32    134.78   258.89  9.98  31.0  0.23  0.120  3.1  5000 33140 https://srikobatteries.com/product/sodium-ion-battery-33140-3-1v-10ah-31wh-12c-cylindrical-battery/
  0.40    112.50   224.09  21.85 54.0  0.48  0.241  3.0  5000 46145 https://srikobatteries.com/product/sodium-ion-46145-3-0v-18ah-54wh-10c-rechargeable-battery/
  0.20    122.22   231.09  43.70 220.0 1.8   0.952  3.2  5000 pack  https://srikobatteries.com/product/sodium-ion-na-5c-70ah-220wh-battery/
  
  C($/Wh) D(Wh/kg) D(Wh/L) P($)  E(Wh) M(kg) Vol(L) V(V) C    S     URL(Lithium-ion)
  0.23    252.00   761.77  2.85  12.6  0.05  0.017  3.6  300  18650 https://www.18650batterystore.com/products/samsung-35e
  0.16    262.01   742.41  2.85  18.0  0.069 0.024  3.6  300  21700 https://www.18650batterystore.com/products/samsung-50e
  
  O:   outlay
  D:   density
  P:   price
  E:   energy
  M:   mass
  Vol: volume
  V:   voltage
  C:   cycles
  S:   size
  
  Note: 26700 is not the same as 27100, they are just what each site specializes in.
  Comment: I think that it should have been 18065 instead of 18650 because then the last 3 digits could be length in mm, same for the others, but what do I know.
  Edit: I forgot to add cycles. When considered, they drop the price of sodium-ion to roughly 5-10 times less than lithium-ion for the batteries shown here.

zackmorris2• 9 months ago

It bugged me that lithium-ion battery listings only state 300-500 charge cycles, so I did a deeper dive with AI and found these batteries for a better comparison:

  O($/Wh) D(Wh/kg) D(Wh/L) P($)  E(Wh) M(kg) Vol(L) V(V) C    S     URL(Lithium-ion)
  0.31    236.17   671.08  3.4   11.1  0.047 0.017  3.7  1000 18650 https://www.alibaba.com/product-detail/Wholesale-18650-Lithium-Battery-INR18650-3_1601503766893.html
  0.36    222.00   671.08  3.99  11.1  0.05  0.017  3.7  800  18650 https://www.alibaba.com/product-detail/Hot-Selling-Factory-Price-INR18650-30Q_1601159662361.html
  0.83    160.00   290.20  4     4.8   0.03  0.017  3.2  2000 18650 https://www.batteryspace.com/LiFePO4-18650-Rechargeable-Cell-3.2V-1500-mAh-4.8Wh-7.5A-Rate.aspx
  0.36    227.85   1088.24 6.4   18    0.079 0.017  3.2  3000 18650 https://www.goldencellpower.com/product-item/18650-1100mah-3-2v-lifepo4-cells/
  0.36    222.78   1064.06 6.4   17.6  0.079 0.017  3.2  3000 18650 https://www.batteryspace.com/LiFePO4-18650-Rechargeable-Cell-3.2V-2000-mAh-6.4Wh-6A-Rate.aspx
  0.80    134.74   365.71  10.18 12.8  0.095 0.035  3.2  4000 26650 https://www.batteryspace.com/LiFePO4-26650-Rechargeable-Cell-3.2V-4000-mAh-12.8Wh-12A-Rate.aspx
  0.24    184.00   396.07  3.5   14.72 0.08  0.037  3.2  3000 26700 https://www.alibaba.com/product-detail/lithium-ion-battery-cell-26700-3_1601277009356.html
  0.31    240.00   413.29  4.8   15.36 0.064 0.037  3.2  4000 26700 https://www.sunpowernewenergy.com/product/26700-high-rate-lifepo4-battery-45e/
  0.31    160.00   128.28  4.8   15.36 0.096 0.120  3.2  4000 33140 https://www.alibaba.com/product-detail/High-Quality-LMFP-5AH-Cell-Lithium_1601161018743.html
  0.28    256.41   167.03  5.6   20    0.078 0.120  3.2  5000 33140 https://www.evlithium.com/LiFePO4-Battery/33140-20ah-lifepo4-battery-cell.html

  Edit: dangit, I made a mistake in my previous post. A($/Wh) and C($/Wh) were supposed to be O($/Wh) for outlay. I fixed this one to provide context.

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