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Nickel lithium manganate-based positive electrode material of lithium ion battery and preparation method thereof

A lithium-ion battery, lithium nickel manganese oxide technology, applied in battery electrodes, secondary batteries, circuits, etc., to improve cycle performance, increase reversible specific capacity, and reduce production costs

Inactive Publication Date: 2016-02-24
四川省有色冶金研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the production cost of lithium ion battery is high, the reversible specific capacity of the battery is low, the energy density and fast charging and discharging ability are not enough, and the cycle performance and safety performance are not enough. The purpose is to provide a lithium ion battery based on lithium nickel manganate The battery positive electrode material and its preparation method solve the problems of improving the reversible specific capacity, energy density and rapid charge and discharge capacity of the battery while reducing the production cost, and improving the cycle performance and safety performance

Method used

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  • Nickel lithium manganate-based positive electrode material of lithium ion battery and preparation method thereof
  • Nickel lithium manganate-based positive electrode material of lithium ion battery and preparation method thereof
  • Nickel lithium manganate-based positive electrode material of lithium ion battery and preparation method thereof

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Effect test

Embodiment 1

[0040] The lithium battery prepared by adopting the positive electrode material of the present invention includes an aluminum-plastic film casing, a positive pole ear 1, a negative pole ear 2 and a pole ear glue 3, and the aluminum-plastic film shell 4 is composed of a battery cell 5 and an electrolyte. Core 5 comprises positive electrode sheet, diaphragm and negative electrode sheet; As figure 1 shown;

[0041] The positive electrode includes a current collector aluminum foil, an active material uniformly coated on the surface of the aluminum foil, a binder and a conductive agent;

[0042] The negative electrode includes a current collector copper foil, an active material uniformly coated on the surface of the copper foil, a binder and a conductive agent;

[0043] The positive electrode slurry coating is composed of the following material ratios: Al2O3 coating of lithium nickel manganese oxide: conductive carbon black (SP): carbon nanotubes (CNT): binder polyvinylidene fluor...

Embodiment 2

[0058] The lithium battery prepared by adopting the positive electrode material of the present invention includes an aluminum-plastic film casing, a positive pole ear 1, a negative pole ear 2 and a pole ear glue 3, and the aluminum-plastic film shell 4 is composed of a battery cell 5 and an electrolyte. Core 5 comprises positive electrode sheet, diaphragm and negative electrode sheet; As figure 1 shown;

[0059] The positive electrode includes a current collector aluminum foil, an active material uniformly coated on the surface of the aluminum foil, a binder and a conductive agent;

[0060] The negative electrode includes a current collector copper foil, an active material uniformly coated on the surface of the copper foil, a binder and a conductive agent;

[0061] The positive electrode slurry coating is composed of the following material ratios: Al2O3 coating of lithium nickel manganese oxide: conductive carbon black (SP): carbon nanotubes (CNT): binder polyvinylidene fluor...

Embodiment 3

[0075] Embodiment 3: The lithium battery prepared by adopting the cathode material of the present invention includes an aluminum-plastic film casing, a positive electrode ear 1, a negative electrode ear 2, and an electrode ear glue 3. The aluminum-plastic film casing 4 is composed of a cell 5 and an electrolyte. The electric core 5 includes a positive electrode sheet, a separator and a negative electrode sheet; as figure 1 shown;

[0076] The positive electrode includes a current collector aluminum foil, an active material uniformly coated on the surface of the aluminum foil, a binder and a conductive agent;

[0077] The negative electrode includes a current collector copper foil, an active material uniformly coated on the surface of the copper foil, a binder and a conductive agent;

[0078] The positive electrode slurry coating is made of the following material ratios: Al2O3 coating of lithium nickel manganese oxide: conductive carbon black (SP): carbon nanotubes (CNT): bind...

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Abstract

The invention discloses a nickel lithium manganate-based positive electrode material of a lithium ion battery and a preparation method thereof. A material used for a positive plate comprises a positive electrode current collector and a positive electrode slurry coating which is composed of a positive electrode active substance, a binder, a conductive agent and a solvent, wherein the positive electrode active substance is an Al2O3 coating of nickel lithium manganate, the binder is one or more selected from the group consisting of polyvinylidene fluoride and polytetrafluoroethylene, the conductive agent is one or more selected from the group consisting of conductive carbon black, conductive graphite and a carbon nanotube, the solvent is N-methylpyrrolidone, and the positive electrode current collector employs an aluminum foil. The lithium ion battery designed in the invention has reduced cost, and the purposes of improving reversible specific capacity, energy density, rapid charging and discharging capability, cycle performance and safety performance are achieved.

Description

technical field [0001] The invention relates to a lithium battery, in particular to a lithium ion battery cathode material based on lithium nickel manganese oxide and a preparation method thereof. Background technique [0002] With the rapid development of economy and society and the continuous progress of science and technology, the problems of energy shortage and deterioration of ecological environment have become the strategic cores affecting the sustainable development of human society. This has prompted people to look for clean and renewable new energy. As the "carrier" of portable energy in today's society, lithium-ion batteries are widely used in energy storage, communication, and national defense construction, especially in the promotion of new energy vehicles, which have risen to the height of national strategy. At present, the positive electrode materials of commercial lithium-ion batteries are mainly LiCoO2, LiFePO4, LiCoNiMnO2, LiMn2O4, and the negative electrod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M4/62H01M10/0525
CPCH01M4/505H01M4/525H01M4/625H01M10/0525Y02E60/10
Inventor 万宁常丽娟黄小丽贾元波刘晔岳波李延俊
Owner 四川省有色冶金研究院有限公司
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