Author Dr. Simon Madgwick of Nuvvon Inc.
Last post Nuvvon showed their solid state 5Ah SiC NMC cell cycling continuously at 3C/5C for 1000 cycles full DoD to 90% SoC.
Next up is the cell demonstrating incredible sub-zero temperature performance. Here we see discharging at C/5 down to -50° C delivering over 50% capacity. Such cold temperature performance is remarkable in the market and when combined with cold temperature charging it is possibly unique. Here we see also -40° C charging at C/5.
The last post on these cells will be comparing the 1,000 cycle performance using 10psi external pressure versus cycling performance at zero external pressure. (Spoiler alert, it’s the same!).
These solid state batteries have moved a long way both in terms of low temperature performance and 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.