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Composite electrode material and preparing method thereof

A composite electrode and electrochemical technology, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problems of unfavorable device stability, cycle performance and service life, huge charge and discharge, and large electrode internal resistance. , to achieve the effects of easy large-scale industrial production, simple operation, good thermal conductivity and electrical conductivity

Active Publication Date: 2017-06-13
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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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 provide a composite electrode material and its preparation method, aiming to solve the problem that existing electrode materials generate huge heat during charging and discharging due to their large electrode internal resistance and low thermal conductivity, which is difficult to dissipate, which is not conducive to Improve the stability, cycle performance and service life of the device

Method used

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preparation example Construction

[0021] And, the embodiment of the present invention also provides a preparation method of a composite electrode material, comprising the following steps:

[0022] S01. Provide a carbon-based film, and deposit a porous metal on one surface of the carbon-based film by electroplating to prepare a porous metal layer;

[0023] S02. In situ growing an electrochemically active material on the surface of the porous metal layer to prepare an electrochemically active material layer.

[0024] Specifically, in the above step S01, the carbon-based film includes a graphene film and a graphite film. Before electroplating, it also includes cutting the carbon-based film to obtain a material with a suitable size and suitable as an electroplating electrode. As a specific example, the graphite film or graphene film can be cut into 4cm*1cm, and the area for subsequent deposition of porous metal is 1cm 2 .

[0025] In the embodiment of the present invention, the carbon-based film is used as an e...

Embodiment 1

[0062] A preparation method of a composite electrode material, comprising the following steps:

[0063] S11. Provide graphene film and cut it into 1*4cm 2 strip.

[0064] S12. Connect the graphene film to the cathode, and the platinum sheet electrode to the anode, and get 100ml of basic plating solution (0.1M NiCl 2 ·6H 2 O+2M NH 4 Cl), at 2A / cm 2 Electrodeposition at a current density of 60s, where the deposited area is 1cm 2 .

[0065] S13. With 20ml solution (0.03M Ni(NO 3 ) 2 ·6H 2 O, 0.01M Mn(COOH) 2 ·6H 2 O and 0.56g urotropine) and transferred to a hydrothermal axe. The graphene electrode deposited with porous nickel was put into a hydrothermal ax and kept at 80°C for 14 hours. After the electrode was taken out, it was washed several times with deionized water and ethanol, and dried.

[0066] The thermal conductivity of the prepared graphene composite electrode was calculated by the laser thermal conductivity tester to be 543.863W m -1 K -1 , much higher t...

Embodiment 2

[0068] A preparation method of a composite electrode material, comprising the following steps:

[0069] S21. Provide graphene film and cut it into 1*4cm 2 strip.

[0070] S22. Connect the graphene film to the cathode, and the platinum sheet electrode to the anode, and get 100ml of basic plating solution (0.1M NiCl 2 ·6H 2 O+2M NH 4 Cl), at 2A / cm 2 Electrodeposition at a current density of 40s, where the deposited area is 1cm 2 .

[0071] S23. With 20ml solution (0.03M Ni(NO 3 ) 2 ·6H 2 O, 0.01M Mn(COOH) 2 ·6H 2 O and 0.56g urotropine) and transferred to a hydrothermal axe. The graphene electrode deposited with porous nickel was put into a hydrothermal ax and kept at 80°C for 14 hours. After the electrode was taken out, it was washed several times with deionized water and ethanol, and dried.

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Abstract

The invention provides a composite electrode material and a preparing method thereof. The composite electrode material comprises a carbon-based film, a porous metal layer and an electrochemical activity substance layer, wherein the carbon-based film, the porous metal layer and the electrochemical activity substance layer are sequentially arranged; the electrochemical activity substance layer is formed in an in-situ-growth mode on the surface of the porous metal layer. The preparing method of the composite electrode material includes the following steps that the carbon-based film is provided, porous metal is deposited on a surface of the carbon-based film with the electroplating method, and the porous metal layer is prepared; electrochemical activity substances grow on the surface of the porous metal layer in an in-situ mode, and the electrochemical activity substance layer is prepared.

Description

technical field [0001] The invention belongs to the field of composite electrode materials, in particular to a composite electrode material and a preparation method thereof. Background technique [0002] With the rapid development of society, non-renewable resources are decreasing day by day, and environmental pollution is becoming more and more serious. There is an urgent need to develop and utilize new types of high-efficiency green energy, but these are inseparable from electrochemical energy storage. In recent years, there have been many studies on electrochemical energy storage devices, mainly in the field of lithium-ion batteries and supercapacitors. They can provide good energy density and power density, and have excellent cycle performance and good stability; some are even flexible and can be fabricated into wearable devices, thereby expanding their application fields. Therefore, electrochemical energy storage will continue to become a hot spot and focus of research...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/32H01G11/86
CPCY02E60/13H01G11/86H01G11/30H01G11/32
Inventor 孙蓉姜莉符显珠
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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