What are solid-state batteries?

In solid-state batteries, both electrodes and the electrolyte consist of solid material. Although some solid-state batteries are already in use in electric cars or trucks (e.g. in the “Bollore Blue Car”), most are currently still under development.

The advantages of all-solid-state batteries (ASSB) over the common liquid electrolyte batteries are the replacement of the (usually highly flammable) liquid electrolyte by a solid electrolyte. Furthermore, solid-state batteries have a higher energy density and a faster charging capacity, which is an important property for the rise in electromobility.

Different materials such as polymers, metals and ceramics are used in various combinations for solid-state batteries.