Block copolymer electrolyte used to make stable sodium metal batteries
https://techxplore.com/news/2022-07-block-copolymer-electrolyte-stable-sodium.html
"built two similar prototypes—both of them had one sodium metal electrode. They differed in the makeup of the other electrode. In one of the prototypes, the other electrode was made using a sodium-vanadium phosphate while the other was made using sodium iron phosphate... able to hold charge and do so after 900 cycles... holding 97% of initial capacity... more stable than other sodium-based batteries, despite their high weight, storage devices for alternative energy farms"
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