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Preparation method of LiNixCoyMn1-x-yO2/Li2O.B2O3 composite anode material

A technology of composite cathode material and complexing agent, applied in battery electrodes, electrical components, electrochemical generators, etc., can solve the problems of incomplete metal ion precipitation, strong complexing ability of ammonia water, high volatility of ammonia water, etc. Industrial production, low equipment requirements, and guaranteed co-precipitation effect

Inactive Publication Date: 2018-11-06
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of different complexing agents has different effects on the complexation process. Because ammonia water has a strong complexing ability, it is widely used as a co-precipitation complexing agent. Complete and uneven precipitation, and ammonia water is highly volatile, which is easy to cause environmental pollution

Method used

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  • Preparation method of LiNixCoyMn1-x-yO2/Li2O.B2O3 composite anode material
  • Preparation method of LiNixCoyMn1-x-yO2/Li2O.B2O3 composite anode material
  • Preparation method of LiNixCoyMn1-x-yO2/Li2O.B2O3 composite anode material

Examples

Experimental program
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Effect test

Embodiment 1

[0040] A kind of LiNi x co y mn l-x-y o 2 / Li 2 O·B 2 o 3 A preparation method for a composite cathode material, comprising the steps of:

[0041] S1, 2.350g nickel acetate, 1.245g cobalt acetate are dissolved in deionized water to obtain nickel-rich solution A, 0.139g nickel acetate, 1.245g cobalt acetate, 2.451g manganese acetate are dissolved in deionized water to obtain manganese-rich solution B, rich The volume of nickel solution A is equal to the volume of manganese-rich solution B, then slowly add nickel-rich solution A into manganese-rich solution B, and add Na with a concentration of 2mol / L under an inert atmosphere 2 CO 3 solution and NH at a concentration of 2 mol / L 4 HCO 3 solution, adjust the pH to 9, stir magnetically at 55°C for 10h at a stirring speed of 650rpm / min, wash by centrifugation, dry at 110°C for 12h, and grind to obtain a concentration gradient Ni 1 / 3 co 1 / 3 mn 1 / 3 CO 3 Precursor;

[0042] S2, the excess LiOH and Ni 1 / 3 co 1 / 3 mn 1 / 3...

Embodiment 2

[0047] A kind of LiNi x co y mn l-x-y o 2 A method for preparing a positive electrode material, comprising the steps of:

[0048]S1, 2.350g nickel acetate, 1.245g cobalt acetate are dissolved in deionized water to obtain nickel-rich solution A, 0.139g nickel acetate, 1.245g cobalt acetate, 2.451g manganese acetate are dissolved in deionized water to obtain manganese-rich solution B, rich The volume of nickel solution A is equal to the volume of manganese-rich solution B, then slowly add nickel-rich solution A into manganese-rich solution B, and add Na with a concentration of 2mol / L under an inert atmosphere 2 CO 3 solution and NH at a concentration of 2 mol / L 4 HCO 3 solution, adjust the pH to 10, magnetically stir at 55°C for 10h, and the stirring speed is 650rpm / min, centrifuge and wash, dry at 110°C for 12h, and grind to obtain a concentration gradient Ni 1 / 3 co 1 / 3 mn 1 / 3 CO 3 Precursor;

[0049] S2, the excess LiOH and Ni 1 / 3 co 1 / 3 mn 1 / 3 CO 3 The precurso...

Embodiment 3

[0053] A kind of LiNi x co y mn l-x-y o 2 A method for preparing a positive electrode material, comprising the steps of:

[0054] S1, 2.350g nickel acetate, 1.245g cobalt acetate are dissolved in deionized water to obtain nickel-rich solution A, 0.139g nickel acetate, 1.245g cobalt acetate, 2.451g manganese acetate are dissolved in deionized water to obtain manganese-rich solution B, rich The volume of nickel solution A is equal to the volume of manganese-rich solution B, then slowly add nickel-rich solution A into manganese-rich solution B, and add Na with a concentration of 2mol / L under an inert atmosphere 2 CO 3 solution and NH at a concentration of 2 mol / L 4 HCO 3 solution, adjust the pH to 11, stir magnetically at 55°C for 10h, and the stirring speed is 650rpm / min, wash by centrifugation, dry at 110°C for 12h, and grind to obtain a concentration gradient Ni 1 / 3 co 1 / 3 mn 1 / 3 CO 3 Precursor;

[0055] S2, the excess LiOH and Ni 1 / 3 co 1 / 3 mn 1 / 3 CO 3 The prec...

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Abstract

The invention discloses a preparation method of an LiNixCoyMn1-x-yO2 / Li2O.B2O3 (x is larger than 0 and is smaller than or equal to 0.6, and y is larger than 0 and is smaller than or equal to 0.4) composite anode material. The preparation method comprises the following steps: preparing a NixCoyMn1-x-yCO3 precursor by adopting a coprecipitation method, then sufficiently mixing with a lithium source,finally preparing an LiNixCoyMn1-x-yO2 anode material by adopting a high temperature solid phase method, enabling the surface of a particle to be manganese-rich and nickel-poor to be beneficial for improving the stability of the material, and then preparing the LiNixCoyMn1-x-yO2 / Li2O.B2O3 composite anode material by adopting a wet chemistry method. The material has relatively high specific capacity, high in high rate performance, and high in cycle performance, and can be applied in fields such as various portable electronic equipment, electric vehicles and energy storage equipment.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a LiNi battery x co y mn l-x-y o 2 / Li 2 O·B 2 o 3 Composite cathode material and preparation method thereof. Background technique [0002] Since my country is a country with a large population and energy shortage, the per capita resource is small, the energy situation is very severe, and the energy problem is facing serious challenges. And when fossil fuels are burned, they will release a lot of harmful gases and dust, which has become one of the sources of environmental pollution in our country. All of these require people to improve the utilization of resources and develop clean and renewable new energy sources, among which lithium-ion batteries are one of the effective ways to achieve this goal, thus promoting the commercial application of lithium-ion batteries. With the continuous improvement of the performance of lithium-ion batteries, it has been appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/62H01M10/0525
CPCH01M4/366H01M4/505H01M4/525H01M4/624H01M4/628H01M10/0525Y02E60/10
Inventor 祝杰张阳阳张宏立
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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