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New Cobalt-Free Silicon EV Battery Is The Best Thing Ever (cleantechnica.com)

submitted 2 months ago* (last edited 2 months ago) by ArtikBanana@lemmy.dbzer0.com to c/technology@lemmy.world

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“This breakthrough development translates into a remarkable improvement in cell-core energy density, reaching 2,000Wh/L in batteries and approximately 1,700Wh/L in full-size EV batteries – more than double the performance of current state-of-the-art technologies,”

“Sienza’s 3D pure silicon anode has demonstrated an average gravimetric capacity of 2,941 mAh/g,” Professor Gharib said. “This means that for every gram of silicon, our batteries can store 2,941 milliampere-hours of electricity, significantly higher than the industry standard for graphite, with a gravimetric capacity of 372 mAh/g.”

Aside from completely avoiding the cobalt issue, Sienza notes that its manufacturing process does not rely on the solvent-based coating systems deployed for producing conventional lithium-ion batteries. Sienza cites one commonly used solvent in particular, N-methyl-pyrrolidone (NMP).

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[–] Ducky@lemmy.world -3 points 2 months ago (2 children)

Weight isn't as big a concern with EVs because they require more energy to accelerate, but they get more energy back when regeneratively braking. The biggest impact on EV range is aerodynamic, by a long shot. The F-150 lightning, for example, has the same efficiency with the standard and extended range batteries, even though the extended range battery is 500 lbs heavier.

[–] ThrowawayPermanente@sh.itjust.works 28 points 2 months ago (2 children)

Weight still contributes to tire and brake wear which causes particulate pollution, makes handling worse, and makes crashes more energetic.

[–] ilinamorato@lemmy.world 4 points 2 months ago

I don't think that's what the op was arguing with. I think they were just saying that weight is not the first thing that needs optimized here.

[–] Ducky@lemmy.world 1 points 2 months ago

Yeah absolutely. I never said anything to the contrary. There are reasons to reduce EV weight, but range ain't one of them.

[–] surewhynotlem@lemmy.world 4 points 2 months ago (1 children)

230 miles on 98 kWh capacity = 0.4260 kWh per mile

300 miles on 131 kWh capacity = 0.4366 kWh per mile

Is that significant? Eh... But at the same time I wouldn't throw 500 lb weights in the back and drive around claiming it didn't impact performance.

[–] weew@lemmy.ca 5 points 2 months ago

But at the same time I wouldn't throw 500 lb weights in the back and drive around claiming it didn't impact performance.

Yeah, you put it in the driver's seat

Ayyyoooooooo