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Zinc manganate negative electrode material, method for preparing zinc manganate negative electrode material by adopting coprecipitation method and application of zinc manganate negative electrode material

A negative electrode material, co-precipitation technology, applied in manganate/permanganate, battery electrodes, structural parts, etc., can solve the problems of high cost and complicated preparation process, achieve high reversible capacity, promote rapid diffusion, The effect of low energy consumption and low cost

Active Publication Date: 2021-04-23
EVE ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, these methods limit ZnMn due to high cost and complicated preparation process. 2 o 4 Development and Application of Negative Electrode Materials

Method used

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  • Zinc manganate negative electrode material, method for preparing zinc manganate negative electrode material by adopting coprecipitation method and application of zinc manganate negative electrode material
  • Zinc manganate negative electrode material, method for preparing zinc manganate negative electrode material by adopting coprecipitation method and application of zinc manganate negative electrode material
  • Zinc manganate negative electrode material, method for preparing zinc manganate negative electrode material by adopting coprecipitation method and application of zinc manganate negative electrode material

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Effect test

Embodiment 1

[0048] This embodiment provides a co-precipitation method to prepare ZnMn 2 o 4 The method of negative electrode material, described method specifically comprises:

[0049] (1) Zinc sulfate and manganese sulfate according to ZnMn 2 o 4 The stoichiometric ratio is weighed and dissolved in deionized water to form a mixed salt solution. The molar ratio of zinc in the zinc source and manganese in the manganese source is 1:2; add 0.3mol / L coprecipitant ammonia water In the constant pressure burette, add ammoniacal liquor dropwise to the mixed salt solution, the rate of addition of ammoniacal liquor is controlled by the constant pressure burette to be 2s / drop, in the process of dripping ammoniacal liquor, the mixed salt solution is continuously stirred to obtain the precipitate, the stirring speed 300r / min, the total dripping amount of ammonia is 15wt% of the total mass of the mixed salt solution;

[0050] (2) The precipitate was aged for 10 hours, then filtered, washed once wit...

Embodiment 2

[0052] This embodiment provides a co-precipitation method to prepare ZnMn 2 o 4 The method of negative electrode material, described method specifically comprises:

[0053] (1) Zinc chloride and manganese chloride according to ZnMn 2 o 4 The stoichiometric ratio was weighed and dissolved in deionized water to form a mixed salt solution. The molar ratio of the zinc element in the zinc source and the manganese element in the manganese source was 1:2; add 0.32mol / L coprecipitant ammonia water In the constant pressure burette, add ammoniacal liquor dropwise to the mixed salt solution, the rate of addition of ammoniacal liquor is controlled by the constant pressure burette to be 2s / drop, in the process of dripping ammoniacal liquor, the mixed salt solution is continuously stirred to obtain the precipitate, the stirring speed It is 320r / min, and the total dripping amount of ammoniacal liquor is 16wt% of the total mass of mixed salt solution;

[0054] (2) The precipitate was aged...

Embodiment 3

[0056] This embodiment provides a co-precipitation method to prepare ZnMn 2 o 4 The method of negative electrode material, described method specifically comprises:

[0057] (1) Zinc nitrate and manganese nitrate according to ZnMn 2 o 4 The stoichiometric ratio was weighed and dissolved in deionized water to form a mixed salt solution. The molar ratio of the zinc element in the zinc source and the manganese element in the manganese source was 1:2; add 0.34mol / L coprecipitant ammonia water In the constant pressure burette, dropwise add ammoniacal liquor to the mixed salt solution, control the drip rate of ammoniacal liquor to be 3s / drop through the constant pressure burette, in the process of dripping ammoniacal liquor, carry out continuous stirring to the mixed salt solution to obtain the precipitate, the stirring speed 340r / min, the total dripping amount of ammonia is 20wt% of the total mass of the mixed salt solution;

[0058] (2) The precipitate was aged for 12 hours, th...

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Abstract

The invention provides a zinc manganate negative electrode material, a method for preparing the zinc manganate negative electrode material by adopting a coprecipitation method and application of the zinc manganate negative electrode material. The method comprises the step of preparing a ZnMn2O4 negative electrode material by adopting the coprecipitation method by taking a mixed salt solution of a manganese source and a zinc source as a raw material and taking ammonia water as a coprecipitation agent. According to the method for preparing the ZnMn2O4 negative electrode material through the coprecipitation method, compared with a common coprecipitation agent, ZnMn2O4 particles with excellent performance and a porous nano structure can be obtained without strict physical conditions, and the method is low in energy consumption and cost, environmentally friendly and suitable for large-scale industrial preparation.

Description

technical field [0001] The invention belongs to the technical field of negative electrode materials, and relates to a negative electrode material, a method for preparing it by a co-precipitation method, and an application thereof, in particular to a zinc manganate negative electrode material, a method for preparing it by a co-precipitation method, and an application. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, no memory effect, long cycle life, and environmental friendliness, and are widely used in the field of portable electronic devices. In recent years, the application of lithium-ion batteries in the field of high-power and long-life batteries such as electric vehicles and hybrid electric vehicles has also received more and more attention. At present, graphite-based anode materials are widely used in lithium-ion batteries. On the one hand, carbon-based anode materials have the advantages of low price, electrochemical in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/12H01M4/485H01M4/505H01M10/0525
CPCY02E60/10
Inventor 张天戈邓松辉陈志伟王理刘金成刘建华
Owner EVE ENERGY CO LTD
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