Patent ID: 9126844
Filing Date: 2015-09-08
Classification: C01D,C01G,C01P,H01B,H01M,Y02E

Abstract:
1. A process for preparing a lithium containing material of formula Na wherein the y is less than 0.2 and M, if present, is one or more metal cation selected from one or more monovalent, divalent, trivalent or tetravalent cations, and wherein the Na y Li x Ni z Mn 1-z-z′ M z′ O d , contains a spinel or spinel-like component, the process comprising: exchanging lithium ions for sodium ions in a precursor composition of formula Na y′ Li x′ Ni z Mn 1-z-z′ M z′ O d′ wherein M is a metal cation, x′+y′>1, 0<z<0.5, 0≦z′≦0.5, y′+x′+1 is less than d′, and the value of d′ depends on the proportions and average oxidation states of the metallic elements, Li, Na, Mn, Ni, and M, if present, such that the combined positive charge of the metallic elements is balanced by the number of oxygen anions, d′; wherein the exchange of lithium ions for sodium ions is accomplished by reacting a mixture of the precursor composition with a lithium salt dissolved in an organic solvent, the precursor composition and the resulting exchanged lithium containing material being insoluble in the organic solvent.