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Preparation method of manganese dioxide and application

A technology of manganese dioxide and oxidant, which is applied in the field of lithium-ion batteries, can solve problems such as the instability of the positive electrode modified material structure, achieve good stability and cycle performance, improve stability, and reduce the effect of contact probability

Inactive Publication Date: 2018-11-27
CH AUTO TECH CORP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the present invention proposes a preparation method and application of manganese dioxide, aiming to solve the problem of unstable structure of the existing lithium-ion battery positive electrode modified materials

Method used

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  • Preparation method of manganese dioxide and application
  • Preparation method of manganese dioxide and application
  • Preparation method of manganese dioxide and application

Examples

Experimental program
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Effect test

Embodiment 1

[0063] (1) Weigh an appropriate amount of pure phase ternary lithium-ion battery cathode material LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 , added to deionized water, and ultrasonically oscillated until the pure-phase ternary material is uniformly dispersed; adding 0.49 g of manganese acetate to the dispersion, and ultrasonically oscillated until the manganese acetate is completely dissolved to obtain the first mixed solution;

[0064] (2) Add 4.47g hydroxyethylenediamine tetraacetic acid to the first mixed solution, and ultrasonically vibrate until the complexing agent is completely dissolved to obtain the second mixed solution;

[0065] (3) Add an appropriate amount of sodium dodecylsulfonate to the second mixed solution, and ultrasonically vibrate until it is completely dissolved to obtain a third mixed solution. to stir;

[0066] (4) Weigh an appropriate amount of potassium hydroxide and potassium persulfate respectively, add them to deionized water, and dissolve; add the two to the...

Embodiment 2

[0069] (1) Weigh an appropriate amount of pure phase ternary lithium-ion battery cathode material LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 , added to deionized water, and ultrasonically oscillated until the pure-phase ternary material is uniformly dispersed; adding 0.98 g of manganese acetate to the dispersion, and ultrasonically oscillated until the manganese acetate is completely dissolved to obtain the first mixed solution;

[0070] (2) Add 4.47g of diethylenetriaminepentaacetic acid to the first mixed solution, and ultrasonically vibrate until the complexing agent is completely dissolved to obtain a second mixed solution;

[0071] (3) Add an appropriate amount of α-olefin sulfonate to the second mixed solution, and ultrasonically vibrate until it is completely dissolved to obtain a third mixed solution, and carry out the process on the third mixed solution under the condition that the temperature of the water bath is 35° C. stir;

[0072] (4) Weigh an appropriate amount of sodium hy...

Embodiment 3

[0075] (1) Weigh an appropriate amount of pure phase ternary lithium-ion battery cathode material LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 , added to deionized water, and ultrasonically oscillated until the pure-phase ternary material is uniformly dispersed; adding 0.49 g of manganese acetate to the dispersion, and ultrasonically oscillated until the manganese acetate is completely dissolved to obtain the first mixed solution;

[0076] (2) Add 1.49g ethylenediaminetetraacetic acid (EDTA) to the first mixed solution, and ultrasonically vibrate until the complexing agent is completely dissolved to obtain a second mixed solution;

[0077] (3) Add an appropriate amount of sodium lauryl sulfate to the second mixed solution, ultrasonically vibrate until it is completely dissolved to obtain a third mixed solution, and carry out stir;

[0078] (4) Weigh an appropriate amount of sodium hydroxide and potassium persulfate respectively, add them to deionized water, and dissolve; add the two to the ...

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Abstract

The invention provides a preparation method of manganese dioxide and an application. The preparation method of manganese dioxide provided by the invention comprises the following steps: forming a Mn<2+> complex precipitate from a manganous salt under the action of a complexing agent, and oxidizing Mn<2+> into Mn<4+> by an oxidizing agent so as to prepare MnO2 of a stable structure; and performingheat treatment on the obtained MnO2 so as to remove adsorbed water and bound water therein, so that the electrochemical performance is ensured. The preparation method is simple in process and low in cost, the prepared manganese dioxide is of a nano-flake structure, and can be used for shortening the diffusion path of lithium ions and increasing the contact area with electrolyte during preparationof a battery positive electrode material, so that the contact probability between the active material in the positive electrode material and the electrolyte is reduced, corrosion of the electrolyte onthe active material can be effectively inhibited, and the stability of the positive electrode modified material is improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a preparation method and application of manganese dioxide. Background technique [0002] Today's social and economic development is very rapid, people's living standards continue to improve, and the demand for energy in human society is also increasing. However, non-renewable fossil energy sources such as coal, oil, and natural gas are far from being able to meet people's growing energy needs, and the environmental pollution caused by burning fossil fuels is also becoming more and more serious, among which PM2.5 is the most eye-catching, and many urban smog The smog is serious, so the main task of today's society is to find and develop new energy sources with high efficiency, environmental protection and sustainable development. Devices that can convert chemical energy into electrical energy are called chemical power sources, and have attracted extensive attention ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/62H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/366H01M4/505H01M4/525H01M4/625H01M10/0525Y02E60/10
Inventor 陆群张奎博
Owner CH AUTO TECH CORP CO LTD
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