An electrode material comprising diamond topology binary or ternary alkali metal chalcogenidometallates, their use and lithium chalcogenidometalates

摘要

Electrode material suitable for use in a lithium ion accumulator, comprising (a) a compound in the composition AnMq zTxQY mROH (I) where A = alkali metal M = ion of a transition metal element and the valence q T = tetrel, with the exception of Pb , Q = chalcogen ROH = crystallized solvent, with R = H, CH3 and / or C2H5 n = 2y - 4x - zq z = 0 or 1 or 1 x = 2y - 2zq - ny = n + zq + 4x, m = 0, 1 or greater 1, q = 1, 2, 3, 4, 5 or 6 where the compound is in a crystal structure with diamond topology, in which - either A, T and Q as well as M, if z = 1 or 1, Lattice sites of the cubic or hexagonal diamond structure occupy or - the centers of gravity of complex anions [TxQy] nz– and / or [MzTxQz] n– occupy the lattice sites (atomic positions) of the cubic or hexagonal diamond structure, while the ions of the alkali metal A and ROH, provided m ≠ 0, occupying interstitial spaces, and (b) an electronically conductive material.