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Preparation method for lithium battery anode material LiNi0.5Mn1.5O4

A lithium-ion battery, cathode material technology, applied in the direction of manganate/permanganate, etc., can solve the problems of unstable sol state, affecting electrochemical performance, precipitation, etc., achieving good crystallization performance, avoiding precipitation, particle size small effect

Inactive Publication Date: 2012-06-13
MCNAIR TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the precursor prepared by the sol-gel method has the advantages of good solution uniformity, small particle size, good crystallization performance, high initial capacity, and good cycle performance. However, during the preparation process, the sol state is relatively unstable. If the process parameters are controlled Improper, it is easy to generate precipitation, affecting LiNi 0.5 mn 1.5 o 4 electrochemical performance

Method used

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  • Preparation method for lithium battery anode material LiNi0.5Mn1.5O4
  • Preparation method for lithium battery anode material LiNi0.5Mn1.5O4
  • Preparation method for lithium battery anode material LiNi0.5Mn1.5O4

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Embodiment 1

[0020] A kind of lithium-ion battery cathode material LiNi 0.5 mn 1.5 o 4 The preparation method comprises following preparation steps:

[0021] A. Prepare the solution: first weigh 0.0105mol of LiCH 3 COO·2H 2 O, 0.005mol of Ni(CH 3 COO) 2 4H 2 O, 0.015mol of Mn(CH 3 COO) 2 4H 2 O, join in 250ml deionized water and constantly stir to make it mix evenly, be mixed with mixed solution I; Then take the citric acid of 0.0305mol, add deionized water and be mixed with 100ml chelating agent under stirring; Finally chelating agent is dripped slowly Put into the mixed solution I in the constant stirring, utilize ammonia water to adjust the solution pH value to be 7, configure and obtain the mixed solution II; The weighing amount of lithium acetate dihydrate, nickel acetate tetrahydrate, manganese acetate tetrahydrate is according to , The ratio of the amount of Mn is 1.05:0.5:1.5.

[0022] B. Add cetyltrimethylammonium bromide (CTAB) dropwise: take 0.0305mol of CTAB and add ...

Embodiment 2

[0028] A kind of lithium-ion battery cathode material LiNi 0.5 mn 1.5 o 4 The preparation method comprises following preparation steps:

[0029] A. Prepare the solution: first weigh 0.0105mol of LiCH 3 COO·2H 2 O, 0.005mol of Ni(CH 3 COO) 2 4H 2 O, 0.015mol of Mn(CH 3 COO) 2 4H 2 O, join in 250ml deionized water and constantly stir to make it mix evenly, be mixed with mixed solution I; Then take the citric acid of 0.0305mol, add deionized water and be mixed with 100ml chelating agent under stirring; Finally chelating agent is dripped slowly Into the mixed solution I in the constant stirring, utilize ammonia water to adjust the pH value of the solution to be 6~8, configure to obtain the mixed solution II; The ratio of the amount of substances of Ni, Mn is 1.05:0.5:1.5.

[0030] B. Add cetyltrimethylammonium bromide (CTAB) dropwise: take 0.0305mol of CTAB and add it to deionized water to prepare 250ml solution III. After stirring the mixed solution II obtained in step...

Embodiment 3

[0036] A kind of lithium-ion battery cathode material LiNi 0.5 mn 1.5 o 4 The preparation method comprises following preparation steps:

[0037] A. Prepare the solution: first weigh 0.0105mol of LiCH 3 COO·2H 2 O, 0.005mol of Ni(CH 3 COO) 2 4H 2 O, 0.015mol of Mn(CH 3 COO) 2 4H 2 O, join in 250ml deionized water and constantly stir to make it mix evenly, be mixed with mixed solution I; Then take the citric acid of 0.0305mol, add deionized water and be mixed with 100ml chelating agent under stirring; Finally chelating agent is dripped slowly Put into the mixed solution I in the constant stirring, utilize ammonia water to adjust the solution pH value to be 8, configure and obtain mixed solution II; , The ratio of the amount of Mn is 1.05:0.5:1.5.

[0038] B. Add cetyltrimethylammonium bromide (CTAB) dropwise: take 0.0305mol of CTAB and add it to deionized water to prepare 250ml solution III. After the mixed solution II obtained in step A is stirred rapidly for 5 hours...

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Abstract

The invention relates to the technical field of battery materials, in particular to a preparation method for lithium battery anode material LiNi0.5Mn1.5O4, which uses a CTAB (cetyltrimethyl ammonium bromide)-assisted sol-gel method and particularly includes solution preparation, dropwise adding hexadecyl trimethyl ammonium bromide, gelling, drying, presintering and roasting. Using the preparation method for lithium battery anode material LiNi0.5Mn1.5O4 can avoid precipitate during sol-gel preparation, and the LiNi0.5Mn1.5O4 prepared by the method is small in particle size, high in crystallinity, high in initial discharging specific capacity and fine in circulating performance.

Description

technical field [0001] The invention relates to the technical field of battery materials, in particular to LiNi, a lithium-ion battery cathode material. 0.5 mn 1.5 o 4 preparation method Background technique [0002] With the development of industry and the depletion of fossil energy, the pressure of environmental pollution and energy shortage is increasing. It is imperative to find new energy and develop new energy-saving tools. The development of new energy materials is a major issue that must be solved in the 21st century. . As a new type of green battery, lithium-ion batteries are currently mainly used in portable electronic products, and are also widely used as vehicle power supplies to provide power for electric vehicles (EVs) to reduce environmental pollution caused by traditional fuel vehicles. Due to its high specific energy and light weight, lithium-ion batteries can also be used as a power source for artificial satellites in space technology, thereby reducing ...

Claims

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Application Information

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IPC IPC(8): C01G45/12
Inventor 乔智李中延沙鸥闫继唐致远罗永莉马莉刘东
Owner MCNAIR TECH
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