Patent ID: 8092941

Claim:
A method of producing a battery, accumulator, supercap, fuel cell, sensor or electrochromic device having high energy density and chemical stability comprising incorporating a solid ion conductor having a garnet-like crystal structure and a higher ion conductivity than 3.4×10 −6 S/cm into said battery, accumulator, supercap, fuel cell, sensor or electrochromic device, wherein the solid ion conductor has a stoichiometric composition of L 5+x A y G z M 3 O 12 , and wherein L is in each case independently an arbitrary preferably monovalent cation, A is in each case independently a monovalent, divalent, trivalent or tetravalent cation, G is in each case independently a monovalent, divalent, trivalent or tetravalent cation M is in each case independently a trivalent, tetravalent or pentavalent cation, 0<x≦2, 0≦y≦3, 0≦z≦3 and wherein O can be partially or completely replaced by divalent and/or trivalent anions, and wherein at least one of A and G is a divalent cation.