CRYSTALLINE MATERIAL, PREPARATION METHOD THEREFOR AND APPLICATION THEREOF, POSITIVE ELECTRODE ACTIVE MATERIAL OF BATTERY, POSITIVE ELECTRODE MATERIAL OF BATTERY, BATTERY AND ELECTRICAL EQUIPMENT

摘要

The present application relates to the technical field of positive electrode active materials of batteries, and provided thereby are a crystalline material, a preparation method therefor and an application thereof, a positive electrode active material of a battery, a positive electrode material of a battery, a battery and an electrical equipment. The crystalline material has a molecular formula of KLi₃Tm(C₂O₄)₃, wherein Tm is a transition metal, and the transition metal is at least one selected from among Co, Ni, Mn, Cu, Zn, Ti, V and Cr. Therefore, the technical problems in which the types of existing positive electrode active materials of potassium ion batteries are limited, and the electrochemical performance of potassium ion batteries made using said types is not ideal are ameliorated. The crystalline material provided by the present application simultaneously has potassium ions and lithium ions, and may be applied both to potassium ion batteries as a positive electrode active material and lithium ion batteries as a positive electrode active material, which effectively expands the types of positive electrode active materials of batteries and increases battery capacity.