Dry coating lithium-ion battery cathode particles with small amounts of graphene extends battery's life and performance

https://www.caltech.edu/about/news/graphene-builds-a-better-battery 

"cost-effective, improved performance, less cobalt, quickly charge, longer time between charges (charge-rate capacity), environmentally friendly... mixing large/ small particles at room-temperature under certain conditions enables uniform coating... sharply reduced transition metal dissolution, doubled battery cycle life, allowed battery function across wider temperature range... scalable, fits into existing battery manufacturing"