New method promises safe, more efficient solid-state batteries .
https://www.inceptivemind.com/new-method-promises-safe-more-efficient-solid-state-batteries/
https://www.eurekalert.org/news-releases/983768
https://insideevs.com/news/581729/volumetric-energy-density-ev-batteries-growth/
https://techxplore.com/news/2020-12-class-cobalt-free-cathodes-energy-density.html
Device could use your motion to charge phone
https://www.futurity.org/device-energy-human-motion-1492932/
https://www.innovationintextiles.com/new-device-harvests-electricity-from-human-motion/
https://www.engineering.com/story/harvesting-energy-from-human-movement
Batteries from junkyard scrap metal and household chemicals?
https://www.forbes.com/sites/carmendrahl/2016/11/07/how-scientists-turned-junkyard-scrap-metal-into-a-battery/?sh=474554e05abc