METHOD FOR PRODUCING LITHIUM TITANATE PRECURSOR, METHOD FOR PRODUCING LITHIUM TITANATE, LITHIUM TITANATE, ELECTRODE ACTIVE SUBSTANCE, AND STORAGE DEVICE

A method for producing a lithium titanate precursor includes the step of grinding a lithium compound and a titanium compound in a state where these compounds coexist. More preferably, a method for producing a lithium titanate precursor includes the steps of: mixing a lithium compound and a titanium compound; and grinding the lithium compound and the titanium compound in a state where these compounds coexist by the mixing.