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A metal-doped manganese carbonate electrode material based on carbon cloth growth and its preparation method and application

A metal doping, electrode material technology, applied in nanotechnology for materials and surface science, battery electrodes, circuits, etc., can solve the problems of low cycle performance preparation technology, achieve high cycle stability, reduce the required time , the effect of simple synthesis process

Active Publication Date: 2022-06-28
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the present invention aims at the problems of low cycle performance and preparation technology caused by structure collapse and reaction process dissolution of manganese-based materials as cathodes of aqueous zinc-ion batteries at the present stage, and proposes a new material manganese carbonate (MnCO 3 ) on the basis of metal M (M = any one of Co, Ni, Cu, Zn, Li, etc.) doping obtained metal-doped manganese carbonate (M-MnCO 3 ) Electrode material and preparation method and application in zinc ion battery

Method used

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  • A metal-doped manganese carbonate electrode material based on carbon cloth growth and its preparation method and application
  • A metal-doped manganese carbonate electrode material based on carbon cloth growth and its preparation method and application
  • A metal-doped manganese carbonate electrode material based on carbon cloth growth and its preparation method and application

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Embodiment 1

[0048] A kind of pure manganese carbonate (MnCO 3 / CC) preparation method of electrode material, the steps are as follows:

[0049] (a) At room temperature, cut a 3*2cm empty carbon cloth and put it into an empty beaker, add concentrated nitric acid with a concentration of 8mol / L, and place the beaker in a water bath for 2 hours at a constant temperature of 70°C. ; After soaking, clean the carbon cloth alternately with deionized water and absolute ethanol for 5 to 6 times, put it in a drying box after cleaning, and dry it at 60°C for 12 hours, for later use;

[0050] (b) in another beaker, add 10mmoL manganese acetate, 50mmoL urea and 40mL deionized water, after the configuration, the resulting mixture is put into a magnetic stirrer and stirred, until the solid is completely dissolved to obtain a mixed solution;

[0051] (c) put the mixed solution obtained in step (b) into the inner liner of the 100mL reaction kettle; after cleaning the polytetrafluoroethylene plate with abso...

Embodiment 2

[0054] A kind of nickel-doped manganese carbonate (Ni-MnCO) based on carbon cloth growth in this embodiment 3 / CC) preparation method of electrode material, the steps are as follows:

[0055] (a) At room temperature, cut a 3*2cm empty carbon cloth and put it into an empty beaker, add concentrated nitric acid with a concentration of 8mol / L, and place the beaker in a water bath for 2 hours at a constant temperature of 70°C. ; After soaking, clean the carbon cloth alternately with deionized water and absolute ethanol for 5 to 6 times, put it in a drying box after cleaning, and dry it at 60°C for 12 hours, for later use;

[0056] (b) in another beaker, add 2mmoL manganese acetate, 8mmoL nickel acetate, 50mmoL urea and 40mL deionized water, after configuring, the resulting mixture is put into a magnetic stirrer and stirred, until the solid is completely dissolved to obtain a mixed solution;

[0057] (c) put the mixed solution obtained in step (b) into the inner tank of the 100mL r...

Embodiment 3

[0060] A kind of cobalt-doped manganese carbonate (Co-MnCO) grown based on carbon cloth in this embodiment 3 / CC) preparation method of electrode material, the steps are as follows:

[0061] (a) At room temperature, cut a 3*2cm empty carbon cloth and put it into an empty beaker, add concentrated nitric acid with a concentration of 8mol / L, and place the beaker in a water bath for 2 hours at a constant temperature of 70°C. ; After soaking, clean the carbon cloth alternately with deionized water and absolute ethanol for 5 to 6 times, put it in a drying box after cleaning, and dry it at 60°C for 12 hours, for later use;

[0062] (b) in another beaker, add 9mmoL manganese acetate, 1mmoL cobalt acetate, 50mmoL urea and 40mL deionized water, after configuring, the resulting mixture is put into a magnetic stirrer and stirred, until the solid is completely dissolved, to obtain a mixed solution;

[0063] (c) put the mixed solution obtained in step (b) into the inner tank of the 100mL r...

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Abstract

The invention discloses a metal-doped manganese carbonate electrode material based on carbon cloth growth, a preparation method and an application thereof, and belongs to the technical field of water-based zinc-ion battery cathode energy storage materials. In the present invention, carbon cloth is used as the base, and the carbon cloth is pretreated and placed in a mixed solution of a reactor liner equipped with appropriate proportions of metal salts, manganese salts and urea, and the carbon cloth is fixed with a polytetrafluoroethylene plate. Finally, the reactor device is put into a drying oven for hydrothermal reaction, wherein: the reaction temperature is set at 100-180° C., the reaction time is set at 16-24 hours, and after the reaction is completed, it can be cleaned and dried. After the metal-doped manganese carbonate of the present invention changes its appearance, the stability of the structure is improved, the surface area of ​​the reaction process is increased, and its energy density is also improved. In addition, the electrode material prepared by the present invention reduces the electrostatic force on the zinc ions intercalated and deintercalated into the cathode material during the charging and discharging process of the battery, increases the electrical conductivity, and improves the electrochemical performance of the battery.

Description

technical field [0001] The invention belongs to the technical field of cathode energy storage materials for aqueous zinc ion batteries, and in particular relates to a metal-doped manganese carbonate (M-MnCO) grown on carbon cloth. 3 / CC) electrode material and preparation method and application thereof. Background technique [0002] In aqueous zinc-ion battery (ZIB) systems, manganese-based materials have attracted more and more attention from researchers due to their high theoretical capacity, large discharge platform and low cost. However, in actual charge and discharge, Zn 2+ The intercalation and deintercalation process of the cathode material will lead to volume expansion or structural collapse of the material, reducing the energy density of the battery; the accompanying disproportionation reaction will lead to the dissolution of manganese ions, thereby weakening its cycle stability; the electrostatic interaction between lattices, The irreversible side reactions also ...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M10/36B82Y30/00B82Y40/00
CPCH01M4/5825H01M10/36B82Y40/00B82Y30/00Y02E60/10
Inventor 王浩刘鹏程段金霞王浚英汪汉斌马国坤桃李彭小牛张军万厚钊
Owner HUBEI UNIV
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