Nanometer oxide coated lithium titanate negative electrode material of lithium battery, and preparation method for negative electrode material

A nano-oxide, lithium titanate-coated technology, applied in battery electrodes, nanotechnology, nanotechnology, etc., can solve the problems of poor electrode and battery stability and consistency, battery inflation, high cost, etc., and achieve high solid content, exposure reduction, and content reduction effects

Active Publication Date: 2013-04-10
DONGFANG ELECTRIC CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The invention aims to solve the problems in the prior art that lithium titanate negative electrode material causes battery inflation, high cost, non-environmental protection, poor stability and consistency of electrodes and batteries, and provides a

Method used

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  • Nanometer oxide coated lithium titanate negative electrode material of lithium battery, and preparation method for negative electrode material
  • Nanometer oxide coated lithium titanate negative electrode material of lithium battery, and preparation method for negative electrode material
  • Nanometer oxide coated lithium titanate negative electrode material of lithium battery, and preparation method for negative electrode material

Examples

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Embodiment 1

[0039] A lithium battery nano oxide-coated lithium titanate negative electrode material, comprising the following raw material components in weight percentage:

[0040] Mixed oxides 1%

[0041] Lithium titanate 40%

[0042] Water-based binder 8%

[0043] Surfactant 2%

[0044] Deionized water 49%;

[0045] The mixed oxide is a rod-shaped oxide and a spherical oxide, and the mixed oxide is a coating layer coated on the surface of lithium titanate;

[0046] The surfactant is one of polyoxyethylene-polyoxypropylene polymer, polyvinylpyrrolidone, polyoxyethylene fatty alcohol ether and polyoxyethylene fatty acid ester or a plurality of them in any proportion.

Embodiment 2

[0048]A lithium battery nano oxide-coated lithium titanate negative electrode material, comprising the following raw material components in weight percentage:

[0049] Mixed oxides 10%

[0050] Lithium titanate 60%

[0051] Water-based binder 1%

[0052] Surfactant 0.5%

[0053] Deionized water 28.5%;

[0054] The mixed oxide is a rod-shaped oxide and a spherical oxide, and the mixed oxide is a coating layer coated on the surface of lithium titanate;

[0055] The surfactant is one of polyoxyethylene-polyoxypropylene polymer, polyvinylpyrrolidone, polyoxyethylene fatty alcohol ether and polyoxyethylene fatty acid ester or a plurality of them in any proportion.

Embodiment 3

[0057] A lithium battery nano oxide-coated lithium titanate negative electrode material, comprising the following raw material components in weight percentage:

[0058] Mixed oxides 10%

[0059] Lithium titanate 60%

[0060] Water-based binder 8%

[0061] Surfactant 2%

[0062] Deionized water 20%;

[0063] The mixed oxide is a rod-shaped oxide and a spherical oxide, and the mixed oxide is a coating layer coated on the surface of lithium titanate;

[0064] The surfactant is one of polyoxyethylene-polyoxypropylene polymer, polyvinylpyrrolidone, polyoxyethylene fatty alcohol ether and polyoxyethylene fatty acid ester or a plurality of them in any proportion.

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Abstract

The invention relates to a nanometer oxide coated lithium titanate negative electrode material of a lithium battery, and a preparation method for the negative electrode material, and belongs to the technical field of negative electrode materials of lithium batteries. The negative electrode material comprises the following raw materials in percentage by weight: 1 to 10 percent of mixed oxide, 40 to 60 percent of lithium titanate, 1 to 8 percent of binder, 0.5 to 2 percent of surfactant and 20 to 57.5 percent of deionized water. The lithium titanate negative electrode material is used in combination of spherical and rodlike oxides to serve as coating particles; and the formed oxide coating has the characteristic of compact and uniform coating layer and can cover the surfaces of the lithium titanate particles well.

Description

technical field [0001] The invention relates to a lithium battery negative electrode material and a preparation method thereof. More specifically, the invention relates to a lithium battery nano oxide-coated lithium titanate negative electrode material and a preparation method thereof, belonging to the technical field of lithium battery negative electrode materials. Background technique [0002] At present, the research focus of negative electrode materials for lithium-ion batteries is developing in the direction of power battery materials with high specific energy, high charge-discharge efficiency, high cycle performance, and high-rate charge-discharge resistance. Most of the anode materials for lithium-ion batteries that have been commercialized now are carbon anode materials, but there are some defects in carbon anode materials, such as: SEI film (solid electrolyte membrane) is formed during the first discharge process, resulting in irreversible capacity loss, high tempera...

Claims

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Application Information

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IPC IPC(8): H01M4/485H01M4/62H01M4/131B82Y30/00
CPCY02E60/10
Inventor 谢皎王瑨廖小东王增竹
Owner DONGFANG ELECTRIC CORP LTD
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