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A transition metal ion-doped trimanganese tetraoxide nanosheet array based on carbon cloth growth and its preparation method and application

A technology of transition metal ion and manganese tetraoxide, which is applied in nanotechnology, manganese oxide/manganese hydroxide, and nanotechnology for materials and surface science, can solve the constraints on the development and promotion of zinc-ion batteries, and battery capacity attenuation , structural instability and other issues, to achieve the effect of improving electrochemical performance, high potential window, and easy access to raw materials

Active Publication Date: 2022-03-15
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] It is well known that manganese-based oxides have been a hot research topic as cathode materials for aqueous zinc-ion batteries (ZIBs) due to their high energy density, however, their structural instability leads to poor cycle stability.
For example, the dissolution of the cathode during charge and discharge, irreversible lattice distortion, and electrostatic interactions lead to serious capacity attenuation and poor cycle stability, which severely restrict the development and promotion of zinc-ion batteries (ZIBs).

Method used

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  • A transition metal ion-doped trimanganese tetraoxide nanosheet array based on carbon cloth growth and its preparation method and application
  • A transition metal ion-doped trimanganese tetraoxide nanosheet array based on carbon cloth growth and its preparation method and application
  • A transition metal ion-doped trimanganese tetraoxide nanosheet array based on carbon cloth growth and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0050] A cobalt ion-doped trimanganese tetraoxide (Co-Mn) based on carbon cloth growth in this embodiment 3 o 4 / CC) the preparation method of nanosheet array, the steps are as follows:

[0051] (1) Carbon cloth pretreatment

[0052] First make a 3×3cm 2 The standard empty carbon cloth is soaked in concentrated nitric acid with a concentration of 12mol / L, heated in a water bath at a constant temperature of 80°C for 1 to 2 hours, then the empty carbon cloth is ultrasonically cleaned several times with absolute ethanol and deionized water, and finally dried Boxes are also left to dry overnight.

[0053] (2) material preparation

[0054] Electrolyte preparation: prepare 100mL containing 0.1mol / L manganese acetate tetrahydrate (Mn(CH 3 COO) 2 4H 2 O), 0.1mol / L sodium sulfate (Na 2 SO 4 ) and 0.005mol / L cobalt acetate tetrahydrate (Co(CH 3 COO) 2 4H 2 O) mixed aqueous solution.

[0055] (3) Constant potential electrodeposition

[0056] The treated empty carbon cloth w...

Embodiment 2

[0060] A kind of nickel ion doped manganese tetraoxide (Ni-Mn 3 o 4 / CC) the preparation method of nanosheet array, the steps are as follows:

[0061] (1) Carbon cloth pretreatment

[0062] First make a 3×3cm 2 The standard empty carbon cloth is soaked in concentrated nitric acid with a concentration of 12mol / L, heated in a water bath at a constant temperature of 80°C for 1 to 2 hours, then the empty carbon cloth is ultrasonically cleaned several times with absolute ethanol and deionized water, and finally dried Boxes are also left to dry overnight.

[0063] (2) material preparation

[0064] Electrolyte preparation: prepare 100mL containing 0.1mol / L manganese acetate tetrahydrate (Mn(CH 3 COO) 2 4H 2 O), 0.1mol / L sodium sulfate (Na 2 SO 4 ) and 0.005mol / L nickel acetate tetrahydrate (Ni(CH 3 COO) 2 4H 2 O) mixed solution.

[0065] (3) Constant potential electrodeposition

[0066] The treated empty carbon cloth was used as the working electrode for constant potent...

Embodiment 3

[0070] A copper ion-doped trimanganese tetraoxide (Cu-Mn) based on carbon cloth growth in this embodiment 3 o 4 / CC) the preparation method of nanosheet array, the steps are as follows:

[0071] (1) Carbon cloth pretreatment

[0072] First make a 3×3cm 2 The standard empty carbon cloth is soaked in concentrated nitric acid with a concentration of 12mol / L, heated in a water bath at a constant temperature of 80°C for 1 to 2 hours, then the empty carbon cloth is ultrasonically cleaned with absolute ethanol and deionized water for several times, and finally dried Boxes are also left to dry overnight.

[0073] (2) material preparation

[0074] Electrolyte preparation: prepare 100mL containing 0.1mol / L manganese acetate tetrahydrate (Mn(CH 3 COO) 2 4H 2 O), 0.1mol / L sodium sulfate (Na 2 SO 4 ) and 0.005mol / L copper acetate monohydrate (Cu(CH 3 COO) 2 ·H 2 O) mixed aqueous solution.

[0075] (3) Electrodeposition by CV scanning method

[0076] The treated empty carbon clo...

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Abstract

The invention relates to a carbon cloth-based transition metal ion-doped trimanganese tetraoxide nanosheet array, a preparation method and application thereof. The present invention utilizes the high potential window of the manganese-based material itself as an advantage, and on this basis doped transition metal ions to modify the manganese-based material, thereby improving the electrochemical performance of the zinc-ion battery as a whole. Basic steps: first pretreat the empty carbon cloth; then grow transition metal ion-doped trimanganese tetraoxide nanosheet arrays on the empty carbon cloth by electrodeposition; finally wash and dry. The invention adopts a one-step method, which is convenient and simple, and the raw materials are conveniently obtained, with low cost and non-toxicity, which solves the problems of too many impurities in the material and cumbersome operation in the traditional technology. For the zinc-ion battery cathode material, the present invention optimizes the structure by doping the manganese-based oxide with transition metal ions, thereby improving the electrochemical performance of the battery. This provides a good idea for the selection or improvement of cathode materials for zinc-ion batteries in the future.

Description

technical field [0001] The invention belongs to the field of new energy materials, and relates to a cathode energy storage structural material. More specifically, the invention relates to a transition metal ion-doped trimanganese tetroxide (M-Mn) grown on the basis of carbon cloth. 3 o 4 / CC) nanosheet array and its preparation method and application in zinc ion battery. Background technique [0002] It is well known that manganese-based oxides have been a hot research topic as cathode materials for aqueous zinc-ion batteries (ZIBs) due to their high energy density, however, their structural instability leads to poor cycling stability. For example, the dissolution of the cathode during charge and discharge, irreversible lattice distortion, and electrostatic interactions lead to serious capacity decay and poor cycle stability, which severely restrict the development and promotion of zinc-ion batteries (ZIBs). [0003] Based on the above reasons, this application is filed. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D5/54C01G45/02C25D9/04B82Y30/00B82Y40/00H01M4/50H01M4/62H01M10/054
CPCC01G45/02C25D5/54C25D9/04H01M4/502H01M4/625H01M10/054B82Y30/00B82Y40/00C01P2002/72C01P2004/03C01P2002/85Y02E60/10C01P2002/54C01P2004/24C01P2006/40H01M4/0452H01M4/366H01M4/131H01M4/1391C25D9/08
Inventor 王浩季杰万厚钊张军汪汉斌
Owner HUBEI UNIV
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