Lithium ion secondary cell and method for preparing anode thereof

Abstract

Disclosed lithium ion secondary battery including anode, cathode, electrolyte and diaphragm provides features of high discharge capacity, high discharge energy, long cycle life and excellent current performance. The active material of positive pole includes composite metal oxide of lithium-nickel-cobalt and oxide of lithium-cobalt LiCoO2 mixed each other in certain ratio. The method for preparing positive pole includes steps: baking spherical nickel hydroxide containing high cobalt and compound containing lithium obtains component A; mixing component A and LiCoO2 and adding adhesive, current conducting agent, and solvent; though procedures of string, coating, drying and sheet formatting so as to obtain positive pole. Features are simple and easy of industrialization.

Description

【Technical field】

[0001] The invention relates to a lithium ion secondary battery and a preparation method thereof, in particular to the battery cathode material and a preparation method thereof. 【Background technique】

[0002] With the rapid development of the electronics industry and the information industry, people have higher and higher requirements for the power supply of various electrical products. Among them, lithium-ion secondary batteries are widely used due to their many superior properties. While lithium-ion secondary batteries are widely used, people's requirements for their various performances are also increasing, especially lithium-ion secondary batteries are required to have high comprehensive performance, that is: simultaneously have high discharge capacity, high discharge energy, Long cycle life, excellent high current performance.

[0003] The cathode material is a key part of the lithium-ion secondary battery and is closely related to the various perfor...