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Modified lithium-ion battery and modifying method thereof

A lithium-ion battery, modification technology, applied in the direction of battery electrodes, secondary batteries, secondary battery repair/maintenance, etc., can solve the problem that the uniformity of the coating material cannot be well controlled, and achieve improved cycle stability, Effect of reducing internal resistance and improving rate performance

Inactive Publication Date: 2016-03-16
HEFEI RONGJIE ENERGY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coating has strict requirements on equipment and process, and requires specific treatment to be stable after coating, and the uniformity of the coating material cannot be well controlled

Method used

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  • Modified lithium-ion battery and modifying method thereof
  • Modified lithium-ion battery and modifying method thereof
  • Modified lithium-ion battery and modifying method thereof

Examples

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Effect test

Embodiment 1

[0020] A kind of modified lithium-ion battery provided by the invention is to add 0.1% Li of electrolyte mass in conventional electrolyte 2 CrO 4 , the reaction mechanism forms a layer of Li on the surface of the positive and negative materials in different ways after deposition. 2 +xCrO 4 cladding.

Embodiment 2

[0022] A kind of modified lithium-ion battery provided by the invention is to add 2% Li of electrolyte quality in conventional electrolyte 2 CrO 4 , the reaction mechanism forms a layer of Li on the surface of the positive and negative materials in different ways after deposition. 2 +xCrO 4 cladding.

Embodiment 3

[0024] A kind of modified lithium ion battery provided by the invention is to add 1.5% Li of electrolyte quality in conventional electrolyte solution 2 CrO 4 , the reaction mechanism forms a layer of Li on the surface of the positive and negative materials in different ways after deposition. 2 +xCrO 4 cladding.

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PUM

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Abstract

The invention discloses a modified lithium-ion battery and a modifying method thereof. The invention aims at providing the modified lithium-ion battery which has good conductivity and is capable of increasing electronic conductivity of a material and improving rate performance of the material and the modifying method thereof. According to the technical scheme, the modified lithium-ion battery is characterized in that Li2CrO4 is added in a conventional electrolyte, the Li2CrO4 is subjected to spontaneous reaction on the surface of a positive electrode material so as to form an Li2+xCrO4 coating layer, and an Li2+xCrO4 coating layer is formed after the Li2CrO4 is subjected to charging and lithium-embedding on the surface of a negative electrode material. The modified lithium-ion battery and the modifying method thereof belong to the technical field of batteries.

Description

technical field [0001] The invention provides a lithium ion battery, specifically, a modified lithium ion battery and a modification method thereof, belonging to the technical field of ion electronics. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, high working voltage, long cycle life, and no memory effect. They have been widely used in various fields, such as portable electronic products, electric vehicles, energy storage power stations, and so on. The mainstream lithium-ion battery is mainly composed of four parts: positive electrode material, negative electrode material, electrolyte, and separator. Among them, the cathode material, as the provider of lithium ions, directly affects the energy and life of the finished battery. At present, lithium-ion battery cathode materials include lithium cobalt oxide, lithium iron phosphate, and ternary materials, each of which has its own disadvantages. For example, lithium cobalt oxid...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/36H01M10/0567H01M10/0563H01M10/42H01M10/0525
CPCH01M4/366H01M4/624H01M10/0525H01M10/0563H01M10/0567H01M10/4235Y02E60/10
Inventor 陈性保高典
Owner HEFEI RONGJIE ENERGY MATERIALS CO LTD
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