Lithium battery cathode material preventing static leakage

Abstract

The invention relates to a lithium battery cathode material preventing static leakage. The lithium battery cathode material preventing static leakage is prepared from the following components in parts by weight: 55-75 parts of active material, 25-35 parts of functional material, 5-10 parts of conductive materials and 5-10 parts of binding material, wherein the functional material is 70% lithium iron phosphate solution; the cathode material is a composition of lithium chromate, lithium manganate and a ternary material; 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 acetylene black powder. The defect of failure of lithium ion batteries caused by self-discharge of protection boards is overcome by adopting the lithium battery cathode material preventing static leakage, 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 lithium battery positive electrode material that prevents static leakage. Background technique [0002] Since the commercialization of lithium-ion batteries, most of the positive electrode materials used in lithium-ion batteries are combinations of lithium chromate, lithium manganate and ternary materials, combinations of lithium chromate, lithium manganate and ternary materials, or ternary materials, etc. Its components are mainly active material plus conductive agent plus binder, the active material is the combination of lithium chromate, lithium manganate and ternary materials, the combination of lithium chromate, lithium manganate and ternary materials or the combination of ternary materials Yuan et al.; most of the negative electrode materials use graphite as the active material, and then add some conductive agents and binders; its advantages are high capacity and long cycle life, but cobalt resources are scarce, expensi...

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 combinations of lithium chromate, lithium manganate and ternary materials, combinations of lithium chromate, lithium manganate and ternary materials, or ternary materials, etc. Its components are mainly active material plus conductive agent plus binder, the active material is the combination of lithium chromate, lithium manganate and ternary materials, the combination of lithium chromate, lithium manganate and ternary materials or the combination of ternary materials Yuan et al.; most of the negative electrode materials use graphite as the active material, and then add some conductive agents and binders; its advantages are high capacity and long cycle life, but cobalt resources are scarce, expensive and toxic. Reliable and environmentally friendly cathode materials have become an important research direction for lithium-ion batteries

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