DUAL-DOPED LITHIUM-RICH SOLID SOLUTION POSITIVE ELECTRODE COMPOSITE AND PREPARATION METHOD THEREOF, LITHIUM-ION BATTERY POSITIVE ELECTRODE PLATE, AND LITHIUM-ION BATTERY

摘要

A dual-doped lithium-rich solid solution positive electrode composite, the chemical formula thereof being xLi2MnO3·(1-x)LiMO2·yMaMb, wherein 0＜x＜1, 0＜y＜0.1, M is one of or a combination of Ni, Co, Mn, Ti, Al, Zr, Fe, V, Mg, and W, Ma is one of or a combination of Na and K, and Mb is one of or a combination of F, N, and P; the dual-doped lithium-rich solid solution positive electrode composite solves the problem of the prior art of a voltage plateau drop caused by structural collapse during recirculation of a lithium-rich solid solution positive electrode material. Also provided is a preparation method for the positive electrode composite, containing a lithium-ion battery positive electrode plate of the positive electrode composite and containing a lithium-ion battery of the lithium-ion battery positive electrode plate.