Method for improving capacitance of lithium secondary battery

Abstract

This invention discloses a method for increasing capacity of Li-secondary batteries including: mixing a solvent, adhesive, a positive active material and a conductive agent to prepare positive slurry in the following three steps: 1, putting part of the solvent into the adhesive and mixing them fully to dissolve them completely and then adding the conductive agent and mixing them fully, 2, putting the rest solvent into a positive active material to mix them fully and the positive active material is wet uniformly, 3, fully mixing the products got from step 1 and 2 fully, which increases dispersion degree of the conductive agent in the positive active material.

Description

technical field

[0001] The invention relates to the field of lithium battery manufacturing, in particular to a method for increasing the capacity of lithium secondary batteries. Background technique

[0002] Lithium-ion battery is a high-performance secondary battery, which has the advantages of high working voltage, high volume and weight energy density, long life, low self-discharge rate, no memory effect and good for the environment. It is widely used in mobile communication equipment, Notebook computers, camcorders, PDAs (personal digital assistants), digital cameras, power tools, torpedoes, missiles and other fields.

[0003] In recent years, with the portable electronic devices becoming lighter, higher requirements have been placed on the driving power of the electronic devices, that is, lithium-ion batteries are required to store higher energy in a smaller space. In order to adapt to this trend, scientists from all over the world are making unremitting efforts. In t...