Achieving higher performance with potassium ion battery

https://phys.org/news/2022-04-higher-potassium-ion-battery.html

"The K-ion capacitor with the Nb2C MXene had the most outstanding performance, with the highest power density of 2336 W/kg and an energy density of 24.6 Wh/kg... K-ion capacitor with MXene can discharge power orders of magnitude faster. The capacitor with Nb2C MXene maintained nearly full capacity (94.6%) after 30,000 cycles of discharging 5 amperes/g of electricity, in contrast to the roughly 500 cycles a lithium-ion battery is expected to last"

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