Superlattice germanium films in lithium batteries?

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Dhamodaran Santhanagopalan

I don't quite get what you mean by "superlattice Ge films", but germanium thin films have been used in solid-state LIB.

L.M. Goncalves

Superlattice is a periodic structure of layers of two (or more) materials. Typically, the thickness of one layer is several nanometers. [Wikipedia]

The idea in batteries is to have a structural material to avoid pulverization of the other material, or just to increase contact area.

To my limited knowledge no Superlattices have been used in all-solid-state battery yet