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Zinc manganate graphene positive electrode material with regulated and controlled electron density, chemical self-charging aqueous zinc ion battery as well as preparation method and application

A technology for regulating zinc manganate and electron density, applied in electrochemical generators, nanotechnology for materials and surface science, positive electrodes, etc. Overall performance, effect of increasing active sites and conductivity

Active Publication Date: 2021-12-31
GUANGDONG IND TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the energy source of these self-charging energy systems is highly dependent on the usage environment, and compared with the traditional two-electrode battery configuration, the structure of these systems is more complex, which increases the cost and energy loss of the system

Method used

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  • Zinc manganate graphene positive electrode material with regulated and controlled electron density, chemical self-charging aqueous zinc ion battery as well as preparation method and application
  • Zinc manganate graphene positive electrode material with regulated and controlled electron density, chemical self-charging aqueous zinc ion battery as well as preparation method and application
  • Zinc manganate graphene positive electrode material with regulated and controlled electron density, chemical self-charging aqueous zinc ion battery as well as preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] A zinc manganese oxide / graphene array (N-ZnMn 2 o 4-x / VG) Preparation method of cathode material: wherein 0<x<4.

[0079] (1) Preparation of flexible carbon cloth substrate:

[0080] Make the size 2×3cm 2 The flexible carbon cloth is placed in absolute ethanol for ultrasonic treatment to obtain a cleaned flexible carbon cloth substrate;

[0081] (2)N-ZnMn 2 o 4-x Preparation of / VG nanosheet array material:

[0082] A. Preparation of VG nanosheet array material: A microwave plasma-enhanced chemical vapor deposition (MPECVD) system equipped with a 2.45GHz and 2kW microwave source was used to prepare a vertical graphene (VG) nanosheet array material. First, put the flexible carbon cloth substrate prepared in step (1) into the center of the quartz tube, close the quartz tube and evacuate it to 10 mTorr (mTorr). Then when the temperature inside the quartz tube increases to 400°C, the 550W microwave 2 A hydrogen plasma was obtained at a flow rate of 90 sccm (standar...

Embodiment 2-5

[0088] The preparation method of embodiment 2-5 is identical with embodiment 1, and difference is that the H of VG growth process in step (2) A 2 flow rate. The H of specific VG growth process in the preparation method of embodiment 2-5 2 See Table 1 for flow rate regulation.

[0089] Table 1H 2 flow rate regulation

[0090]

Embodiment 6-9

[0092] The preparation method of embodiment 6-9 is the same as embodiment 1, and difference is that the H of the VG growth process in step (2) A 2 with CH 4 The flow rate ratio, the total amount of gas introduced is 100 sccm. The H of specific VG growth process in the preparation method of embodiment 6-9 2 with CH 4 The flow rate ratio regulation is shown in Table 2.

[0093] Table 2H 2 with CH 4 The flow rate ratio regulation

[0094]

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Abstract

The invention discloses a zinc manganate graphene positive electrode material with regulated and controlled electron density, a chemical self-charging aqueous zinc ion battery as well as a preparation method and application. The preparation method comprises the steps of uniformly coating a layer of zinc manganate nanoparticles on a vertical graphene substrate through an electro-deposition reaction; and introducing nitrogen atoms to the surfaces of the zinc manganate nanoparticles through an ammonia gas thermal reduction reaction to regulate and control the surface electron density, so that the attraction of 3d orbital electrons is weakened, the electron transmission energy is reduced, the active sites and conductivity of the zinc manganate nanoparticles are increased, and then the overall performance of an electrochemical energy storage device using the material as a positive electrode is effectively improved. The zinc battery prepared from the material has a self-charging characteristic, the discharged positive electrode active material is oxidized through a spontaneous oxidation-reduction reaction between the positive electrode active material and oxygen, so that the positive electrode active material is recovered to a charging state, and meanwhile, chemical energy is converted into electric energy to be stored in a system, so that the self-charging process of the battery is realized.

Description

technical field [0001] The invention belongs to the technical field of electrochemical energy storage batteries, and in particular relates to a zinc manganate graphene cathode material with electronic density control, a chemical self-charging water system zinc ion battery, a preparation method and an application thereof. Background technique [0002] With the rapid growth of the world's population and the continuous development of human society, people's various demands for energy are increasing day by day. With the depletion of fossil energy, environmental pollution has become increasingly serious. In recent years, many green and environmentally friendly renewable and clean energy sources have been developed, such as wind energy, solar energy, tidal energy, and geothermal energy. However, due to the shortcomings of intermittent and geographical dispersion, renewable energy cannot provide large-scale, continuous and stable electric energy. At this time, it is necessary to de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/50H01M4/583H01M4/62H01M10/36B82Y30/00B82Y40/00
CPCH01M4/362H01M4/50H01M4/583H01M4/625H01M10/36B82Y30/00B82Y40/00H01M2004/028Y02E60/10
Inventor 林圳超邱文达肖红兵张国铭
Owner GUANGDONG IND TECHN COLLEGE
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