Conventional lithium-ion batteries are made with flammable materials, posing a risk. However, using an innovative nitrate-based additive, German & Chinese researchers have successfully developed a new quasi solid-state lithium-metal battery that is both stable, potentially long-lasting, with higher energy density and able to be manufactured while maintaining the manufacturing methods used for conventional liquid batteries.
https://interestingengineering.com/innovation/nitrate-additive-solid-state-batteries