Brushing thin films onto electrodes preserves batteries

https://techxplore.com/news/2022-08-thin-electrodes-batteries.html

"powders tune surface energy of electrodes... uniform behavior... metal composite surface prevents loss of lithium metal... powder at lithium metal surface produces artificial passivation layer... improves stability throughout charge-discharge cycles... metal surface is stabilized so that it can be safely recharged. To show the technique may have wider application, the lab also ground powder into a sodium electrode and discovered the process greatly stabilized its voltage overpotential"