Author Dr. Simon Madgwick of Nuvvon Inc.
Since the Nuvvon post unveiling Solid State Silicon Anodes (1Ah Silicon NMC), the cells have been scaled up and further differentiated into 250Wh/kg Power cells versus 400Wh/kg Energy cells. Here is the Power cell with continuous 3C Charge / 5C Discharge full DOD – at point of posting 1014 cycles to 91% SOH.
- 5Ah Power Cell NMC SiC
- Cycle Life
- 3C charge / 5C discharge
- Fixture pressure = 10psi
- Chamber temperature = 25°C
- >90% capacity after1000 cycles
The cell is designed for 10C continuous discharge and 30C pulse. Nuvvon SPE accommodates heat generation at punishing C-rates. This 3C/5C test was in a chamber at nominal 25°C. The proprietary SPE exhibits no gassing during formation or cycling and accommodates expansion and contraction of the Silicon cell throughout cycle life.
Nuvvon develops solid polymer electrolytes to enhance the performance and safety of next-generation anodes, including silicon. Continuously improving the electrochemical performance means evaluating new formulas and additives to stabilize the solid electrolyte interphase (SEI), expand the electrochemical stability window, improve low-temperature performance, and maintain performance at elevated temperatures.