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Anode material for lithium battery and preparation method thereof, and lithium battery anode and lithium battery

A positive electrode material, lithium battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of high temperature and high current cycle characteristics need to be improved, difficult to prepare high-purity samples, etc., to achieve good high temperature and high current cycle characteristics , high purity, low cost effect

Inactive Publication Date: 2012-03-28
SUZHOU UNIV
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Problems solved by technology

But there are also some shortcomings, such as the difficulty in preparing high-purity samples, high temperature and high current cycle characteristics need to be improved, etc.

Method used

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  • Anode material for lithium battery and preparation method thereof, and lithium battery anode and lithium battery
  • Anode material for lithium battery and preparation method thereof, and lithium battery anode and lithium battery
  • Anode material for lithium battery and preparation method thereof, and lithium battery anode and lithium battery

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preparation example Construction

[0043] The present invention also provides a method for preparing the above positive electrode material, comprising the following steps:

[0044] a), using a liquid phase mixing method, mixing the manganese source compound, the nickel source compound and the aluminum source compound uniformly in proportion to obtain a mixed solution;

[0045] b) performing spray drying on the mixed solution to obtain a first mixture;

[0046] c) heat-treating the first mixture to obtain a nickel aluminum manganese oxide precursor;

[0047] d), mixing and grinding the nickel aluminum manganese oxide precursor and lithium source compound to obtain a second mixture;

[0048] e) heat-treating the second mixture to obtain a positive electrode material.

[0049]In the above preparation method provided by the present invention, step a), step b) and step c) are the steps of preparing nickel aluminum manganese oxide precursor. In order to fully mix the raw materials uniformly, the present invention ...

Embodiment 1

[0064] 1. Weigh nickel acetate, aluminum nitrate and manganese acetate with the molar ratio of Ni: Al: Mn being 0.475: 0.05: 1.475, add deionized water after mixing to make a mixed solution of 0.5mol / L;

[0065] 2. Dry the mixed solution in step 1 with a spray dryer to obtain the first mixture;

[0066] 3. Calcinate the first mixture in step 2 at a constant temperature of 900°C for 20 hours in an air atmosphere, and cool naturally to obtain the nickel aluminum manganese oxide precursor Ni 0.475 al 0.05 mn 1.475 o 4 ;

[0067] 4. Mix the nickel aluminum manganese oxide precursor and lithium hydroxide in a molar ratio of 1:1 in step 3, and grind to obtain the second mixture;

[0068] 5. Sinter the second mixture in step 4 at a constant temperature of 700°C for 24 hours in an air atmosphere to obtain the general formula LiNi 0.475 al 0.05 mn 1.475 o 4 positive electrode material.

Embodiment 2

[0070] 1. Weigh nickel acetate, aluminum nitrate and manganese acetate with the molar ratio of Ni:Al:Mn being 0.45:0.1:1.45, add deionized water after mixing to form a mixed solution of 0.5mol / L;

[0071] 2. Dry the mixed solution in step 1 with a spray dryer to obtain the first mixture;

[0072] 3. Calcinate the first mixture in step 2 at a constant temperature of 900°C for 20 hours in an air atmosphere, and cool naturally to obtain the nickel aluminum manganese oxide precursor Ni 0.45 al 0.1 mn 1.45 o 4 ;

[0073] 4. Mix the nickel aluminum manganese oxide precursor and lithium hydroxide in a molar ratio of 1:1 in step 3, and grind to obtain a second mixture;

[0074] 5. Sinter the second mixture in step 4 at a constant temperature of 700°C for 24 hours in an air atmosphere to obtain the general formula LiNi 0.45 al 0.1 mn 1.45 o 4 positive electrode material.

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Abstract

The invention provides an anode material for lithium battery, and the anode material is expressed by a general formula LiNi0.5-xAl2xMn1.5-xO4, wherein x satisfies a relation of: 0<2x<=0.5. The invention also provides a preparation method of the anode material and a lithium battery anode and a lithium battery that are prepared from the anode material. The anode material provided by the invention has low cost, good environment friendliness, high purity, good high temperature and heavy current cycle characteristic.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a positive electrode material for a lithium battery and a preparation method thereof, a lithium battery positive electrode and a lithium battery. Background technique [0002] At present, human beings are facing the dual challenges of resource estimation and living environment deterioration. To this end, countries around the world are working hard to develop new materials, promote new concepts of low-carbon life, and promote human society to shift from the current high-energy consumption and high-consumption life and production mode to energy-saving, recyclable and sustainable development. Specifically, vigorously promote the application of clean energy, such as the application of solar energy and wind energy in the field of power generation, and the use of hybrid electric vehicles or pure electric vehicles to replace traditional gasoline-powered vehicles. [0003] The application of cl...

Claims

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Application Information

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IPC IPC(8): H01M4/525H01M4/505H01M10/0525
CPCY02E60/122Y02E60/10
Inventor 李德成贺诗词张茜刘伟伟方国清孙洪丹夏炳波郑军伟
Owner SUZHOU UNIV
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