Efficient sulfur/carbon coated lithium nickelate cathode material and preparation method thereof

Abstract

The invention relates to an efficient sulfur / carbon coated lithium nickelate cathode material and a preparation method thereof. The efficient sulfur / carbon coated lithium nickelate cathode material is prepared from the following components in parts by weight: 45 parts of sulfur / carbon composite material, 45 parts of lithium nickelate, 30 parts of 45% lithium iron nitrate solution, 8 parts of flake graphite and 8 parts of binding material. The efficient sulfur / carbon coated lithium nickelate 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 high-efficiency sulfur / carbon 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 manganate or ternary materials, etc., and its components are mainly lithium nickelate plus conductive agent and then binder. Lithium oxide is lithium nickelate, lithium manganate 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, It is expensive and toxic, so it is an important research direction for lithium-ion batteries to seek cheap, reliable, and environmentally friendly cathode materials. Spinel-type cathode materials represented by lithium manganate and lay...

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 manganate or ternary materials, etc., and its components are mainly lithium nickelate plus conductive agent and then binder. Lithium oxide is lithium nickelate, lithium manganate 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, Expensive and toxic, so it is an important research direction for lithium-ion batteries to seek affordable, reliable, and environmentally friendly cathode materials

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