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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 s
by ngrilly 4y ago
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?
- naasking 4y agoIs there still a fire risk with LFP? From my understanding, solid state batteries have a large safety advantage here because of this.
- Tade0 4y agoYes - 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.
- Tade0 4y agoThat'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.