COMPOSITE ACTIVE MATERIAL FOR LITHIUM-ION BATTERY AND PREPARATION METHOD THEREFOR, ELECTRODE PASTE OF LITHIUM-ION BATTERY, POSITIVE ELECTRODE OR NEGATIVE ELECTRODE OF LITHIUM-ION BATTERY, AND LITHIUM-ION BATTERY

摘要

A composite active material for a lithium-ion battery and a preparation method therefor, an electrode paste of the lithium-ion battery, a positive electrode or a negative electrode of the lithium-ion battery, and the lithium-ion battery. The composite active material for a lithium-ion battery is an additive-coated active material, and the additive is M(OH)_a(PO₄)_b(CO₃)_c(OCOCH₃)_d•eH₂O, M being at least one of an IIA family metal element, an IB family metal element, a IIB family metal element, a IIIB family metal element, a IVB family metal element, a VB family element, a VIB family metal element, a VIIB family metal element, a VIII family metal element, a IIIA family metal element, the IVA family metal element and the VA family metal element, a0,b≥0,c≥0,d≥0 and b, c and d being not simultaneously equal to 0, e≥0. The addition of the additive in the preparation of the positive electrode or the negative electrode of the lithium-ion battery can significantly improves the safety of the prepared lithium-ion battery. As positive and negative active materials, the composite active material for a lithium-ion battery is used for preparing the positive electrode or the negative electrode of the lithium-ion battery, and accordingly, the safety of the prepared lithium-ion battery can be remarkably improved.