They are developing anodes for batteries that will result rapid charging. (Search Niobium Anode battery)
https://www.ai4beginners.com/solid-state-battery-companies/
(Nice picture of a lady with a car at the link!)
They list 7 companies working on solid state batteries for various products.
“QuantumScape’s all-solid-state battery technology is currently the most advanced. Its prototype battery can charge to 80% capacity in 15 minutes and that’s “faster than either conventional battery or alternative solid-state approaches are capable of delivering”.”
I have a car that runs on gasoline because batteries do not work well in the winter months. (If we can get to Solid Hydrogen Fuel cells I might look at an upgrade.)
From the linked article:
2. QuantumScape
QuantumScape is an industry-leading public company (NYSE: QS) that is developing solid-state lithium metal batteries for electric vehicles that provides both high specific energy and high energy density. The company is based in San-Jose and backed by Bill Gates, Volkswagen, Continental AG, and George Soros among other prominent investors.