Novel lithium ion battery cathode composition

Abstract

The invention relates to a novel lithium ion battery cathode composition. The novel lithium ion battery cathode composition is prepared from the following components in parts by weight: 70-75 parts of active material, 5-10 parts of functional material, 4-7 parts of conductive materials and 4-7 parts of binding material, wherein the functional material is 70% lithium iron phosphate solution; the cathode material is lithium chromate; the conductive agents comprise a main conductive agent and an auxiliary conductive agent; the main conductive agent is conductive graphite; the auxiliary conductive agent is flake graphite. The defect of failure of lithium ion batteries caused by self-discharge of protection boards is overcome by adopting the novel lithium ion battery cathode composition, thus improving self-discharge of the whole battery pack, achieving the aim of prolonging the lithium battery storage time and ensuring that the lithium batteries can be stored for a longer time under the condition that users do not charge the electric appliances after using the electric appliances.

Description

technical field [0001] The invention relates to a novel lithium ion battery cathode composition. Background technique [0002] Since the commercialization of lithium-ion batteries, most of the positive electrode materials used in lithium-ion batteries are lithium chromate, lithium chromate or ternary materials, etc., and its components are mainly active materials plus conductive agents and then binders. The active materials It is lithium chromate, lithium chromate or ternary, etc.; most of the negative electrode materials use graphite as the active material, and then add some conductive agent and binder; its advantages are high capacity and long cycle life, but cobalt resources are scarce and expensive And it is toxic, so it has become an important research direction for lithium-ion batteries to seek cheap, reliable, and environmentally friendly cathode materials. Spinel-type cathode materials represented by lithium chromate and layered oxides of ternary materials have been...

AI Technical Summary

Problems solved by technology

[0002] Since the commercialization of lithium-ion batteries, most of the positive electrode materials used in lithium-ion batteries are lithium chromate, lithium chromate or ternary materials, etc., and its components are mainly active materials plus conductive agents and then binders. The active materials It is lithium chromate, lithium chromate or ternary, etc.; most of the negative electrode materials use graphite as the active material, and then add some conductive agent and binder; its advantages are high capacity and long cycle life, but cobalt resources are scarce and expensive And it is toxic, so it is an important research direction for lithium-ion batteries to seek cheap, reliable, and environmentally friendly cathode materials.

Spinel-type positive electrode materials represented by lithium chromate and layered oxides of ternary materials have been extensively studied in the past decade, but their development prospects are restricted by their respective defects.