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Polycrystal LiNixMn2-xO4 anode material and synthesis method thereof

A synthesis method and cathode material technology are applied in the synthesis of polycrystalline LiNixMn2-xO4 cathode materials and in the field of polycrystalline LiNixMn2-xO4 cathode materials, which can solve the problems of complex processing technology, high reaction temperature, long reaction time and the like, and reach the reaction temperature. Low, short time, simple and rapid preparation method

Inactive Publication Date: 2018-09-11
YUNNAN MINZU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above methods all have defects such as complex processing technology, long reaction time, and high reaction temperature.

Method used

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  • Polycrystal LiNixMn2-xO4 anode material and synthesis method thereof
  • Polycrystal LiNixMn2-xO4 anode material and synthesis method thereof
  • Polycrystal LiNixMn2-xO4 anode material and synthesis method thereof

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Experimental program
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Effect test

Embodiment 1

[0064] Embodiment 1: Synthesis of lithium nickel manganese oxide positive electrode material of the present invention

[0065] The implementation steps of this embodiment are as follows:

[0066] According to the molar ratio of lithium, manganese and nickel elements is 1:1.92:0.08, weigh 1.1420g lithium nitrate, 7.7945g manganese acetate and 0.3297g nickel acetate raw materials respectively, add them into a 300mL porcelain crucible, mix evenly, and then mix according to lithium nitrate and The weight ratio of concentrated nitric acid is 1:1.16. Add concentrated nitric acid with a concentration of 6mol / L, stir evenly to obtain a reaction raw material mixture, put the porcelain crucible containing the reaction raw material mixture in an oven, and preheat and dissolve at a temperature of 106°C for 10 minutes. , to obtain a homogeneous solution;

[0067] Then, the porcelain crucible was placed in a muffle furnace, and the combustion reaction was carried out at a temperature of 50...

Embodiment 2

[0069] Embodiment 2: Synthesis of lithium nickel manganese oxide positive electrode material of the present invention

[0070] The implementation steps of this embodiment are as follows:

[0071] According to the molar ratio of lithium, manganese and nickel elements of 1:1.99:0.01, weigh 1.1441g of lithium nitrate, 8.0906g of manganese acetate and 0.0416g of nickel acetate respectively, add them to a 300mL porcelain crucible, mix them evenly, and then mix them according to the ratio of lithium nitrate and The weight ratio of concentrated nitric acid is 1:0.38. Add concentrated nitric acid with a concentration of 2mol / L, stir evenly to obtain a reaction raw material mixture, put the porcelain crucible containing the reaction raw material mixture in an oven, and preheat and dissolve at a temperature of 102°C for 20 minutes. , to obtain a homogeneous solution;

[0072] Then, the porcelain crucible was placed in a muffle furnace, and the combustion reaction was carried out at a t...

Embodiment 3

[0074] Example 3: Synthesis of lithium nickel manganese oxide cathode material of the present invention

[0075] The implementation steps of this embodiment are as follows:

[0076]According to the molar ratio of lithium, manganese and nickel elements is 1:1.97:0.03, respectively weigh 1.1437g lithium nitrate, 8.0060g manganese acetate and 0.1241g nickel acetate raw materials, add them into a 300mL porcelain crucible, mix evenly, and then mix according to lithium nitrate and The weight ratio of concentrated nitric acid is 1:1.13. Add concentrated nitric acid with a concentration of 4mol / L, stir well to obtain a reaction raw material mixture, put the porcelain crucible containing the reaction raw material mixture in an oven, and preheat and dissolve at a temperature of 108°C for 12 minutes. , to obtain a homogeneous solution;

[0077] Then, the porcelain crucible was placed in a muffle furnace, and the combustion reaction was carried out at a temperature of 520 ° C for 1.2 hou...

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Abstract

The invention relates to a polycrystal LiNixMn2-xO4 anode material and a synthesis method thereof. The polycrystal LiNixMn2-xO4 anode material is of a spinel-type structure, the spatial point group isFd3m, the particle size of the material is 50-100 nm, the specific discharge capacity is 101.5-110.2 mAh.g<-1>, and the one hundredth specific discharge capacity is 85.7-102.0 mAh.g<-1>, so that thecapacity retention ratio is 84.4%-92.6%. Compared with the prior art, the synthesized polycrystal LiNixMn2-xO4 anode material has obviously better cycle performance than existing LiMn2O4, the preparation method is simple and fast, and reaction is low in temperature and short in time.

Description

technical field [0001] The invention belongs to the technical field of new energy materials. More specifically, the present invention relates to a polycrystalline LiNixMn2-xO4 positive electrode material, and also relates to a synthesis method of the polycrystalline LiNixMn2-xO4 positive electrode material. Background technique [0002] Lithium-ion batteries have the advantages of high specific capacity, environmental friendliness and no memory effect, so they are widely used in electric vehicles and hybrid electric vehicles and other equipment. Spinel-type LiMn2O4 has the advantages of high safety, high energy density, high power density, rich manganese resources, low toxicity, and environmental friendliness, so it has become one of the most promising cathode materials for lithium-ion batteries. However, its development is restricted due to its shortcomings such as rapid capacity decay during charge-discharge cycles and poor cycle stability at high temperatures (≧55°C). A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 郭俊明于月白红丽
Owner YUNNAN MINZU UNIV