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A kind of preparation method of zinc manganate/silver composite material

A composite material, zinc manganate technology, applied in the direction of structural parts, electrical components, battery electrodes, etc., can solve the problems of poor charge and discharge cycle ability, achieve improved conductivity, simple co-precipitation method, improve initial Coulombic efficiency and cycle The effect of stability

Active Publication Date: 2020-10-09
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing zinc manganate / silver composite material has poor charge-discharge cycle ability, and to provide a zinc manganate / silver composite material with low cost, simple process and excellent electrochemical performance. Preparation method of a zinc manganate / silver composite material for improving the charge-discharge cycle capability of zinc manganate by silver

Method used

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  • A kind of preparation method of zinc manganate/silver composite material
  • A kind of preparation method of zinc manganate/silver composite material
  • A kind of preparation method of zinc manganate/silver composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0024] 1) Dissolve the raw materials zinc nitrate, manganese nitrate and silver nitrate in deionized water, wherein the amount of zinc nitrate is 1.0g, the amount of manganese nitrate is 2.0g, the amount of silver nitrate is 0.1g, and the amount of deionized water is 50mL , the solution was stirred for 10 minutes to form a uniform solution;

[0025] 2) Dissolve 10 g of oxalic acid as a raw material in 50 mL of absolute ethanol, and stir the solution for 10 minutes to form a uniform solution;

[0026] 3) Add the solution described in step 1) dropwise to the solution described in step 2), and keep stirring;

[0027] 4) Centrifuge the above solution to separate the precipitate, wash with ethanol and deionized water respectively, dry the precipitate at 60°C for 360min, then put the dried precipitate into a tube furnace and calcinate at 400°C for 120min to obtain Zinc manganate / silver composite.

Embodiment 2

[0029] 1) Dissolve the raw materials zinc nitrate, manganese nitrate and silver nitrate in deionized water, wherein the amount of zinc nitrate is 2.0g, the amount of manganese nitrate is 4.0g, the amount of silver nitrate is 0.2g, and the amount of deionized water is 60mL , the solution was stirred for 15 minutes to form a uniform solution;

[0030] 2) Dissolve 12g of oxalic acid as a raw material in 60mL of absolute ethanol, and stir the solution for 15 minutes to form a uniform solution;

[0031] 3) Add the solution described in step 1) dropwise to the solution described in step 2), and keep stirring;

[0032] 4) Centrifuge the above solution to separate the precipitate, wash with ethanol and deionized water respectively, dry the precipitate at 65°C for 380min, then put the dried precipitate into a tube furnace and calcinate at 450°C for 150min to obtain Zinc manganate / silver composite.

Embodiment 3

[0034] 1) Dissolve the raw materials zinc nitrate, manganese nitrate and silver nitrate in deionized water, wherein the amount of zinc nitrate is 3.0g, the amount of manganese nitrate is 6.0g, the amount of silver nitrate is 0.3g, and the amount of deionized water is 70mL , the solution was stirred for 18 minutes to form a uniform solution;

[0035] 2) Dissolve 15g of oxalic acid as a raw material in 70mL of absolute ethanol, and stir the solution for 18 minutes to form a uniform solution;

[0036] 3) Add the solution described in step 1) dropwise to the solution described in step 2), and keep stirring;

[0037] 4) Centrifuge the above solution to separate the precipitate, wash with ethanol and deionized water respectively, dry the precipitate at 68°C for 400min, then put the dried precipitate into a tube furnace and calcinate at 480°C for 180min to obtain Zinc manganate / silver composite.

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Abstract

A preparation method of zinc manganate / silver composite material relates to a preparation method of the composite material. The preparation method includes the steps of dissolving zinc nitrate, manganese nitrate and silver nitrate in water and stirring to obtain a solution A; dissolving oxalic acid in absolute ethanol and stirring to obtain a solution B; adding the solution A into the solution B,stirring to obtain a solution C; centrifugally separating precipitate from solution C, washing with ethanol and water, drying, and then calcinating in a tubular furnace to obtain the zinc manganate / silver composite material. The zinc manganate / silver composite is composited by the precursor of zinc manganate and silver in situ. After calcination, the composite material with uniformly distributed zinc manganate and silver is formed directly, which is obviously different from the composite matieral formed by the direct physical mixing of zinc manganate and silver. The homogeneous composition ofzinc manganate and silver can effectively improve the conductivity of the zinc manganate material. The coprecipitation method is simple and can be prepared in large quantities without special processequipment.

Description

technical field [0001] The invention relates to a preparation method of a composite material, in particular to a preparation method of a zinc manganate / silver composite material which is prepared by a co-precipitation method for a lithium ion battery negative electrode material zinc manganate / silver composite material. Background technique [0002] With the rapid development of society, the growing market urgently requires Li-ion batteries with higher energy density. However, despite the advantages of commercial lithium-ion battery graphite anodes with small volume changes during charging and discharging, their theoretical capacity is only 372mA·h / g, which is far from meeting the market demand. Therefore, seeking high-performance, low-cost and easy-to-prepare anode materials for lithium-ion batteries has become the research direction and motivation of scientific researchers. [0003] At present, the commonly used anode materials for lithium-ion batteries include carbon mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/505
CPCH01M4/364H01M4/38H01M4/505Y02E60/10
Inventor 李剑锋何超钟晓斌蒋玉雄
Owner XIAMEN UNIV
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