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A kind of preparation method and application of high stability copper intercalation manganese dioxide electrode material

A manganese dioxide electrode, high-stability technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problem of poor cycle stability of layered manganese dioxide electrode materials, and cannot improve cycle stability and rate performance at the same time. and other problems, to achieve the effect of improving electrochemical performance, excellent electrochemical performance, and improving electrochemical performance

Active Publication Date: 2022-07-12
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] The present invention aims to solve the problem that the cycle stability of the layered manganese dioxide electrode material is not good, and the cycle stability and rate performance cannot be improved at the same time

Method used

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  • A kind of preparation method and application of high stability copper intercalation manganese dioxide electrode material
  • A kind of preparation method and application of high stability copper intercalation manganese dioxide electrode material
  • A kind of preparation method and application of high stability copper intercalation manganese dioxide electrode material

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Embodiment 1

[0046] The preparation method of a high-stability copper intercalated manganese dioxide electrode material of the present embodiment is carried out according to the following steps:

[0047] Dissolve 1mmol, 0.1691g of manganese sulfate in 40mL of deionized water, stir magnetically for 20 minutes, then dissolve 0.1mmol, 0.0250g of copper source in the manganese sulfate solution, and stir to form a first mixed solution; then 6mmol , 0.9482g of potassium permanganate was dissolved in 40mL of deionized water, magnetically stirred for 20 minutes, the potassium permanganate solution was slowly dropped into the first mixed solution, and the second mixed solution was formed after magnetic stirring for 1 h, and then the first mixed solution was added. The two mixed solutions were moved into the lining of the autoclave, put into the autoclave, put into an oven, and reacted at 160° C. for 12 hours. After the reaction is completed, take out and centrifuge with deionized water and vacuum d...

Embodiment 2

[0051] The preparation method of a high-stability copper intercalated manganese dioxide electrode material of the present embodiment is carried out according to the following steps:

[0052] Dissolve 1mmol, 0.1691g of manganese sulfate in 40mL of deionized water, stir magnetically for 20 minutes, then dissolve 0.5mmol, 0.125g of copper source in the manganese sulfate solution, and stir to form a first mixed solution; then 6mmol , 0.9482g of potassium permanganate was dissolved in 40mL of deionized water, magnetically stirred for 20 minutes, the potassium permanganate solution was slowly dropped into the first mixed solution, and the second mixed solution was formed after magnetic stirring for 1 h, and then the first mixed solution was added. The two mixed solutions were moved into the lining of the autoclave, put into the autoclave, put into an oven, and reacted at 160° C. for 12 hours. After the reaction was completed, the precipitate was obtained by centrifugation with deion...

Embodiment 3

[0056] The preparation method of a high-stability copper intercalated manganese dioxide electrode material of the present embodiment is carried out according to the following steps:

[0057] Dissolve 1mmol, 0.1691g of manganese sulfate in 40mL of deionized water, stir magnetically for 20 minutes, then dissolve 1mmol, 0.2497g of copper source in the manganese sulfate solution, and stir to form a first mixed solution; then 6mmol, 0.9482 g of potassium permanganate was dissolved in 40 mL of deionized water, magnetically stirred for 20 minutes, the potassium permanganate solution was slowly dropped into the first mixed solution, and the second mixed solution was formed after magnetic stirring for 1 h. The mixed solution was moved into the lining of the autoclave, put into the autoclave and put into an oven, and reacted at 160° C. for 12 hours. After the reaction was completed, the precipitate was obtained by centrifugation with deionized water, and vacuum-dried at 80 °C for 12 h t...

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Abstract

A preparation method and application of a high-stability copper intercalated manganese dioxide electrode material, which relates to the field of battery materials, and the invention aims to solve the poor cycle stability of the layered manganese dioxide electrode material and the inability to simultaneously improve the cycle stability and rate performance issues. The preparation method of the invention comprises the following steps of mixing manganese sulfate, copper source and potassium permanganate, performing hydrothermal reaction, centrifuging and drying, and then assembling the water-based zinc ion battery. The preparation method provided by the invention has simple operation and low production cost. The prepared copper-intercalated manganese dioxide material achieves good reversibility, thereby improving its cycling stability, at 2.0A g ‑1 The specific capacity retention was 100% after 600 cycles at the same current density. At the same time, it accelerates the intercalation and deintercalation of zinc ions in zinc-ion batteries, and can simultaneously exhibit high specific capacity and excellent cycle stability, as well as excellent electrochemical zinc storage performance and electron transport ability. The present invention is used in the field of batteries.

Description

technical field [0001] The invention belongs to the technical field of zinc ion battery material preparation, and in particular relates to a preparation method and application of a high-stability copper intercalated manganese dioxide electrode material. Background technique [0002] Due to the increasing consumption of non-renewable fossil energy such as coal, oil, and natural gas, and the increasing environmental pollution caused by burning fossil fuels, electrochemical energy storage has gradually entered the stage of energy and played an increasingly important role. Among various energy storage candidates, rechargeable aqueous batteries have attracted great scientific and technological attention due to their low cost, high safety, and long cycle life for large-scale energy storage. Rechargeable lithium-ion batteries dominate the battery market today, but new ones have been intensively researched due to key issues such as their safety, eco-friendliness, and cost-effectiven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/50H01M4/62H01M10/36H01M10/38
CPCH01M4/502H01M4/366H01M10/36H01M4/626H01M10/38Y02P70/50Y02E60/10
Inventor 彭尚龙刘振华张亚男刘彦鹏王蕊刘晓莉王志霞黄娟娟张可晴高继兵曾琦
Owner LANZHOU UNIVERSITY
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