has announced a solid-state battery energy density breakthrough that will create cells with 100x the volumetric density of its current solution.
The new TDK CeraCharge solid-state battery cell hits very high volumetric energy density of 1,000 Wh/L and is on top of that safer than conventional batteries, which is important for wearables like the Apple AirPods or Apple Watch that come in direct contact with the user's skin. As many solid-state battery makers, TDK leveraged an oxide-based solid electrolyte and added lithium alloy anodes. The solid oxide electrolyte is not flammable like its liquid electrolyte counterpart in current Li-ion batteries, so it makes the CeraCharge battery"extremely safe," but that could be said for basically all batteries done with a solid electrolyte.