- cross-posted to:
- technology@slrpnk.net
- cross-posted to:
- technology@slrpnk.net
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non-flammable end use
Safe and stable chemistry
Oh neat, finally a non-explody and/or unstable battery lmao
Well, only relatively.
In order to work batteries need to have a certain amount of instability built in, on a chemical level. Them electrons have to want to jump from one material to a more reactive one; there is literally no other way. There is no such thing as a truly “safe and stable” battery chemistry. Such a battery would be inert, and not able to hold a charge. Even carbon-zinc batteries are technically flammable. I think these guys are stretching the truth a little for the layman, or possibly for the investor.
Lithium in current lithium-whatever cells is very reactive. Sodium on its own is extremely reactive, even moreso than lithium. Based on the minimal lookup I just did, this company appears to be using an aqueous electrolyte which makes sodium-ion cells a little safer (albeit at the cost of lower energy density, actually) but the notion that a lithium chemistry battery will burn but a sodium chemistry one “won’t” is flat out wrong. Further, shorting a battery pack of either chemistry is not likely to result in a good day.
I believe it is still better due to raw material availability?
It is definitely that. That’s kind of the point, actually. Sodium is easier to come by than lithium and does not require mining it from unstable parts of the world, nor relying on China.
nor relying on China
The appeal of China is largely in the size of the labor force. Whether this tech is more or less feasible than cobalt and lithium, businesses will still want to exploit the large volume of cheap Chinese labor in order to build them.
the notion that a lithium chemistry battery will burn but a sodium chemistry one “won’t” is flat out wrong
Flinging a brick of sodium into my bathtub to prove you wrong.
Lower power density, higher cycle life, safer. Sounds good for stationary power storage.
And commuter cars probably. I’d love something I can drive to work and back, and then later upcycle into home energy storage.
CATL showed a 160 Wh/kg sodium-ion battery in 2021 and has plans to increase that density over 200 Wh/kg to better meet the needs of electric vehicles.
Hopefully that happens in a reasonable timeframe. I don’t need high range, I just need cheap to repair or long life for a commuter. Maybe we’ll get something similar for buses and light rail first before getting it for regular cars.
Yes, absolutely. For a regular daily commute to a job that allows you to afford 2 vehicles, having one of the two with a shorter range with more charge cycles makes a lot of sense.
Yup. I’m married with kids, so we need two cars regardless. The commuter just needs to reliably go ~50 miles between charges even during the winter, while the family car needs to fit my wife and kids and go at least 400 miles between charges (we like road trips).
Unfortunately, I haven’t found the right fit since EVs are either too expensive, don’t have enough winter range (e.g. old Leafs), or have too many safety advisories (e.g. batteries catching fire don’t mesh with garage storage). Likewise for family cars. Most current EVs are in the awkward middle: too much range for a commute, and not enough for a road trip.
But if there was an economy car with ~150 miles range and inexpensive batteries, I’d probably buy it.
The Volt was really good for this - 50 miles electric and 430 miles gas on a 7 gallon tank.
Unfortunately, PHEVs fell out of fashion in 2018 and are only just coming back into style. I think the Prius is the only comparable car on the market that manages this. The Kia Niro is also looking reasonably good with a 34 mile EV range.
But if there was an economy car with ~150 miles range and inexpensive batteries, I’d probably buy it.
Both are in the $30-$40k range new. You can find a 2017 Chevy Volt for $16k (and I seriously can’t recommend it enough).
Amazing how far we’re progressing in battery technology in such a short amount of time.
And all it took was $100/BBL gas to get people off their asses. A shame we weren’t pioneering this kind of research 40 years ago.
Sodium? Like, salt sodium?
No, Sodium like the PlayStation game Sodium.
I couldn’t find much in the chemistry but this seems exciting.
Sodium batteries are already in electric cars many months ago
Also you could buy individual cells on AliExpress
