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CT scans of 1k lithium-ion batteries show quality risks in inexpensive cells

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287 points jonbruner | 2 comments | 24 Sep 25 19:29 UTC | HN request time: 0.001s | source
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AtlasBarfed ◴[27 Sep 25 04:18 UTC] No.45393178[source]▶
I get they won't disappear entirely, but what are the applications that 200-225 wh/kg LFP and forthcoming 175 wh/kg sodium ion can't handle with their much better safety profiles?

For higher density applications, semi-solid state is coming for nickel/cobalt chemistry lithium ion, and it has much better fire safety.

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1. jdietrich ◴[27 Sep 25 10:33 UTC] No.45394621[source]▶
LFP is really catching up in terms of energy density, but not power density. LFP cells would give incredibly weak performance in something like a power tool battery, because they can't supply anywhere near the peak current of modern NMC cells, particularly pouch cells or tabless cylindrical cells.

For bulk storage LFP is a no-brainer, but there are still a lot of applications where you really want fast charging or need to handle big surges of current.

replies(1): >>45396496 #
2. AtlasBarfed ◴[27 Sep 25 15:22 UTC] No.45396496[source]▶
So semi-solid state then? What about sodium ion?