New phosphate-and silicate-based electrode materials, more particularly for lithium ion batteries and lithium capacitors

Abstract

The invention relates to the use of new crystalline phosphate- and silicate-based electrode materials, preferably having a hopeite or zeolite lattice structure, which are suitable more particularly for lithium ion batteries and lithium capacitors based on non-aqueous systems. The structure of the inventively used electrode material comprises at least a) 2 to 193 atom % of structure-forming ions M in the form of a lattice structure comprising (MX4)n− coordination polyhedra, where M is selected from one or more elements from groups 2-15, b) 8 to 772 atom % of anions X in the form of a lattice structure comprising (MX4)n− coordination polyhedra, where n=a number from 2-4, X is selected from one or more elements from groups 16 and 17, preferably oxygen, and a fraction of up to 25.01% of the anions X may be replaced by a halide ion such as F− or Cl− or by OH−, c) 0 to 5 atom % of immobile, structure-forming cations of one or more elements from groups 3-13 of the Periodic Table, and d>0 to 46 atom % of mobile cations selected from elements from group 1 or group 11 of the Periodic Table, the structure having at least one channel which is free or is filled wholly or partly with one or more species of the mobile cations and which passes through the unit cell of the structure.

Dependencies are inferred from the claim text.