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Method of preparing manganese-based multi-component oxide cathode materials of lithium ion battery

A lithium-ion battery, cathode material technology, applied in battery electrodes, electrical components, circuits, etc., can solve problems such as difficulty in meeting the needs of high-capacity, high-energy-density electronic products, harsh synthesis conditions, and poor ionic conductivity. Good commercial application prospects, good morphology and structure, uniform distribution effect

Inactive Publication Date: 2013-01-30
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0004] At present, the positive electrode materials used in lithium-ion batteries on the market mainly include LiCoO 2 , LiNiO 2 and LiFePO 4 Wait, but the traditional cathode material LiCoO 2 Low capacity, high cost, and LiNiO 2 The synthesis conditions are harsh, the reversibility is poor and the price is relatively cheap LiFePO 4 The ionic conductivity is poor, and the actual discharge specific capacity is only 160mAh / g
These lithium-ion battery cathode materials are difficult to meet the needs of high-capacity, high-energy-density electronic products

Method used

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Embodiment

[0027] A method for preparing a manganese-based multi-component oxide positive electrode material for a lithium ion battery, the specific preparation steps are as follows:

[0028] 1) 3.081g LiNO 3 and 3.99g Ni(NO 3 ) 2 ·6H 2 O was dissolved in 7 mL of water;

[0029] 2) Add 3.9mL of 50wt% Mn(NO 3 ) 2 The solution is uniformly mixed with the solution prepared in step 1);

[0030] 3) Add 2.2mol citric acid into the solution prepared in step 2), stir evenly until the solution is completely dissolved, and let it stand for about 12 hours;

[0031] 4) Weigh 1g of carbon felt, measure 15mL of the solution prepared in step 3) and drop it evenly on the carbon felt, let it stand for 2 hours to make the carbon felt fully absorb the solution;

[0032] 5) Put the mixture prepared in step 4) into a drying oven at 80°C, take it out after 6 hours, and obtain the precursor;

[0033] 6) Put the precursor prepared in step 5) into a tube furnace, heat up to 300°C at a rate of 5°C / min and...

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Abstract

The invention relates to a method of preparing manganese-based multi-component oxide cathode materials of a lithium ion battery, belonging to the technical field of manufacture process of chemical electrode materials. The method comprises preparing a solution containing Li<+>, Mn<2+>, Ni<2+> and Co<2+>, adding a complexing agent into the solution, absorbing the prepared solution with carbon adsorption materials, placing into a vacuum drying oven, placing into a tubular furnace after drying to pre-burn and calcine, cooling to room temperature according to a program in the tubular furnace after the reaction, grinding and drying to obtain the manganese-based multi-component oxide cathode materials which are small in size and uniformly distributed. According to the invention, the preparation technology is simple, has easily-controlled parameters, and can be easily invested into commercial application. The obtained manganese-based multi-component oxide cathode materials has advantages of good morphology and structure, small-size particles and relatively uniform distribution, thereby preventing agglomeration and reducing the generation of large particles; and shows relatively high charge and discharge specific capacity and good cycle performance when applied in the cathode materials of the lithium ion battery.

Description

technical field [0001] The invention relates to a method for preparing a manganese-based multi-component oxide positive electrode material for a lithium ion battery, and belongs to the technical field of chemical electrode material manufacturing technology. Background technique [0002] Energy and the environment are two major issues facing mankind today. At present, fossil fuels are the main energy sources for human production and life. With the increasing and unscientific use of global energy consumption, non-renewable energy sources such as fossil fuels will become increasingly exhausted and have a serious impact on the environment. This urgently requires people to develop new energy sources. The utilization and development of new energy sources can not only partially solve the crisis of fossil energy depletion, but also reduce environmental pollution. As a new type of environmentally friendly green energy, secondary batteries have received widespread attention worldwid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525
CPCY02E60/122Y02E60/10
Inventor 穆道斌吴锋吴伯荣林静张存中马云凤代文慧
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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