Synthesis of lithium iron sulphides and their use as cathodes
AssigneeQinetiq Limited
InventorsAndrew G Ritchie, Peter G Bowles
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Abstract
A process for the production of a lithium transition metal sulphide such as lithium iron sulphide, the process comprising reacting a transition metal sulphide with lithium sulphide in a solvent comprising a molten salt or a mixture of molten salts. Lithium transition metal sulphides obtained using this process are useful in the production of electrodes, in particular for rechargeable lithium batteries.
Claims3
A process for the synthesis of lithium iron sulphide Li2FeS2, in which reactants consisting of lithium sulphide Li2S and iron sulphide FeS react, under an inert atmosphere, in a solvent consisting essentially of a molten lithium halide salt, or a mixture of molten lithium halide salts, so as to produce Li2FeS2 as the dominant product phase, and recovering the product by dissolution of the molten salt or mixture of molten salts in at least one organic liquid.
Dependencies are inferred from the claim text.