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

submitted 3 months ago* (last edited 3 months ago) by [email protected] to c/[email protected]

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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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[–] [email protected] 106 points 3 months ago* (last edited 3 months ago) (18 children)

That sounds really impressive. But describing it as "the best thing ever" really has my skepticism at full mast.

ETA: I can't find any mention of a single drawback or tradeoff to this new technology. That makes this a marketing piece rather than journalism. Nothing is ever better in every conceivable way than the current state of the art.

[–] [email protected] 22 points 3 months ago (2 children)

Possibly difficult to mass produce. That’s usually what kills all the new great battery tech.

[–] [email protected] 8 points 3 months ago

Sienza calculates that its battery cells cost 48% less than conventional cells to manufacture.

I hope this encourages some manufacturers to endorse it and bring it to market. That could make them save and profit a lot compared to other battery tech manufacturers.

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