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A comment on World’s largest battery maker announces major breakthrough in energy density. Parent comment

Re:World’s largest battery maker announces major breakthroug... by ly3xqhl8g9 on Friday April 21, 2023 @04:09AM (#35651000)
Iron-air batteries (1,200 Wh/kg), and in general metal-air [1], might bring a surprise after 2024: December 2022, "Form Energy will site first American iron-air battery manufacturing plant in Weirton, West Virginia" [2].

[1] 2017, Yanguang Li, Jun Lu, Metal–Air Batteries: Will They Be the Future Electrochemical Energy Storage Device of Choice? https://pubs.acs.org/doi/10.1021/acsenergylett.7b00119 Betteridge's law of headlines answers "no", but good overview.

[2] https://formenergy.com/west-virginia-governor-jim-justice-an...

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Re:World’s largest battery maker announces major breakthroug... by londons_explore on Friday April 21, 2023 @05:19AM (#35651417)
The various "-air" batteries tend to have major downsides...

They tend to get heavier as they discharge. They usually aren't rechargeable (or if they are, only a few times or with much lower energy densities). They tend to self-discharge within a few weeks of non-use.

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Re:World’s largest battery maker announces major breakthroug... by ly3xqhl8g9 on Friday April 21, 2023 @05:29AM (#35651481)
Yes, there are downsides, as always in engineering, it's a matter of managing the compromises for the current implementation and researching better solutions for the next iteration.
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Re:World’s largest battery maker announces major breakthroug... by flavius29663 on Friday April 21, 2023 @10:29AM (#35654292)
and I think they can't output as much current like the current batteries too.
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