Modified graphene-doped lithium nickelate battery cathode material and preparation method thereof

Abstract

The invention relates to a modified graphene-doped lithium nickelate battery cathode material and a preparation method thereof. The modified graphene-doped lithium nickelate battery cathode material is prepared from the following components in parts by weight: 30 parts of graphene oxide, 60 parts of lithium nickelate, 25 parts of 45% lithium iron nitrate solution, 3 parts of flake graphite and 3 parts of binding material. The modified graphene-doped lithium nickelate battery cathode material overcomes the defect of failure of lithium ion batteries caused by self-discharge of protection boards, so that self-discharge of the whole battery pack is improved, the aim of prolonging the storage time of lithium batteries is achieved, and the lithium batteries can be stored for a longer time under the condition that users do not charge electric appliances after using the electric appliances.

Description

technical field [0001] The invention relates to a modified graphene-coated lithium nickelate cathode material and a preparation method thereof. Background technique [0002] Since the commercialization of lithium-ion batteries, most of the positive electrode materials used in lithium-ion batteries are lithium nickelate, lithium nickelate or ternary materials, etc., and its components are mainly active materials plus conductive agents and then binders. The active materials It is lithium nickelate, lithium nickelate 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 nickel 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 nickela...

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 nickelate, lithium nickelate or ternary materials, etc., and its components are mainly active materials plus conductive agents and then binders. The active materials It is lithium nickelate, lithium nickelate 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 nickel 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 nickel oxide and layered oxides of ternary materials have been extensively studied in the past decade, but their development prospects are restricted by their respective defects.