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Anode material of manganese-based lamellar crystal structure lithium battery and manufacturing method thereof

A technology of crystal structure and cathode material, applied in battery electrodes, structural parts, circuits, etc., can solve the problems of difficult preparation process, complex preparation process, unstable batch quality, etc., and achieve broad application prospects, low raw material cost, excellent The effect of battery performance

Inactive Publication Date: 2011-08-17
JIANGSU KING LITHIUM CELL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The cost of raw materials is relatively low, but because of the extremely complicated preparation process, the price of the final finished electrode material is still relatively high
Because of its very poor conductivity, lithium iron phosphate needs to be made into nano-scale powder particles to show better battery cycle performance, which causes great difficulties in the preparation process. Some domestic manufacturers are trying to produce, but Due to the unstable batch quality, it has not been able to be put into large-scale production
At present, only a few manufacturers in the world can mass-produce high-performance lithium iron phosphate, and the price is very expensive (>180,000 yuan / ton)

Method used

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  • Anode material of manganese-based lamellar crystal structure lithium battery and manufacturing method thereof

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Embodiment

[0022] Preparation of manganese-based layered crystal structure lithium battery cathode material Li[Li] by mechanical activation combined with high-temperature solid-state method 0.20 Ni 0.133 co 0.133 mn 0.534 ]O 2 , including the following steps:

[0023] In the first step, Li[Li 0.20 Ni 0.133 co 0.133 mn 0.534 ]O 2 Prebody, the specific steps are

[0024] 1) will Li 2 CO 3 , Ni 2 o 3 , electrolytic MnO 2 ,Co 3 o 4 Take each raw material by stoichiometric ratio and mix homogeneously, make the positive ion molar ratio Li of raw material: Ni: Co: Mn=1.3: 0.133: 0.133: 0.534; Here Li + : The sum of metal ions = 1.25: 0.8, greater than Li[Li 0.20 Ni 0.133 co 0.133 mn 0.534 ]O 2 In the theoretical value (1.2:0.8), the use of excess lithium is because a small part of lithium will volatilize during the sintering process.

[0025] 2) Input isopropanol (isopropanol as a dispersant) into the agitating ball mill through a peristaltic pump, then transfer the unifor...

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Abstract

The invention relates to a lithium battery manufacturing technology, in particular to an anode material of a manganese-based lamellar crystal structure lithium battery and a manufacturing method thereof. The molecular formula of the anode material is Li[Li0.20Ni0.133Co0.133Mn0.534]O2, wherein positive ion molar ratio of Li:Ni:Co:Mn is 1.2:0.133:0.133:0.534. According to the material and the manufacturing method of the material, cheaper metal manganese is used to replace the majority of cobalt in lithium cobalt oxide, thus the material has lower cost, the manufacturing process is simple, micrometer-level powder particles can show outstanding battery performances. The detection proves that the capacity of the anode material can reach 215mAh / g, which is about 40% higher than the capacities of the lithium cobalt oxide and iron phosphate lithium ion; and the material has good safety performance.

Description

technical field [0001] The invention relates to lithium battery manufacturing technology, in particular to a manganese-based layered crystal structure lithium battery cathode material and a preparation method thereof. Background technique [0002] There are three main anode materials commonly used in the market for lithium batteries: lithium cobalt oxide (LiCoO 2 ), lithium manganate (LiMn 2 o 4 ) and lithium iron phosphate (LiFePO 4 ). [0003] Lithium cobalt oxide (LiCoO 2 ) has a layered crystal structure, the storage capacity is about 140mAh / g, and the cycle performance is relatively superior. However, due to the high price of the raw material cobalt, its application is limited to small-capacity batteries, such as rechargeable batteries for small electronic products. [0004] Lithium manganate (LiMn 2 o 4 ), has a spinel crystal structure, and the cost of raw materials is relatively low, but its capacity is only 100mAh / g, which is about 30% lower than lithium coba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M4/1391
CPCY02E60/122Y02E60/12Y02E60/10
Inventor 崔立峰李溪王辉葛云科
Owner JIANGSU KING LITHIUM CELL