Solid-State Battery Has 2x the Energy–and No Anode

Re:Solid-State Battery Has 2x the Energy–and No Anode by ngrilly on Friday March 31, 2023 @08:05AM (#35385782)

I totally agree with your position on LFP, and about 400 Wh/kg being enough to unlock some applications.

But I’m not fully convinced on silicon anodes versus solid state. Yes, energy density is very promising, but I understand capacity fade is still a huge problem due to silicon volume expansion/reduction while charging/discharging?

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Re:Solid-State Battery Has 2x the Energy–and No Anode by Tade0 on Friday March 31, 2023 @08:34AM (#35386125)

That's the problem they've solved here using nanowires - the cells have a 200-1200 cycle life depending on operating conditions - I suppose the range is so wide because of the temperature range - -30°C - 55°C. It's not surprising to see cells degrade fast at the hotter end of this spectrum.

For EVs they advertise cells with no less than 410Wh/L, 4C rate of discharge.

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Re:Solid-State Battery Has 2x the Energy–and No Anode by naasking on Friday March 31, 2023 @08:32AM (#35386104)

Is there still a fire risk with LFP? From my understanding, solid state batteries have a large safety advantage here because of this.

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Re:Solid-State Battery Has 2x the Energy–and No Anode by Tade0 on Friday March 31, 2023 @08:36AM (#35386159)

Yes - LFP still uses a flammable, liquid electrolyte - usually ethylene carbonate.

That being said LFP survives the nail penetration test without causing a fire, so it's considerably safer than the usual alternatives.

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