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a fe 3 o 4 -go composite electrode and its preparation method and application

A composite electrode and electrodeposition technology, applied in the field of electrochemistry, to achieve the effect of improving electrochemical performance, simple process, and low environmental requirements

Active Publication Date: 2021-02-19
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the paper did not involve the addition of graphene and the Fe 3 o 4 Reports that can be used as electrodes

Method used

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  • a fe <sub>3</sub> o <sub>4</sub> -go composite electrode and its preparation method and application
  • a fe <sub>3</sub> o <sub>4</sub> -go composite electrode and its preparation method and application
  • a fe <sub>3</sub> o <sub>4</sub> -go composite electrode and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0053] Will Fe 2 (SO 4 ) 3 Formulated with TEA as Fe +3 and TEA were 0.01 and 0.012mol / L mixed liquid system Fe-TEA; and then prepared 0.4mol / L NaOH solution. The NaOH solution was then dropped into the Fe-TEA while stirring continuously until a clear solution was formed.

[0054] An equal volume of the above transparent solution was added to the 1 mg / mL GO dispersion liquid and ultrasonically dispersed to obtain a uniform and stable electrodeposition liquid.

[0055] Make the cropping area 4×1cm 2 carbon paper as a current collector. First use 4mol / L H 2 SO 4 Soak the carbon paper for 1 hour, then rinse it with deionized water until neutral, then soak it with an equal volume of acetone-alcohol mixed solution for 1 hour, rinse it with deionized water, and dry it for later use. Use 4×4cm 2 The titanium mesh electrode coated with ruthenium oxide was used as the anode, and the surface-treated carbon paper was used as the cathode (the working area was 2 × 1 cm 2 ), using...

Embodiment 2

[0058] Operation process and other conditions are all consistent with embodiment one, and different condition parameters are as follows:

[0059] The composite electrode obtained by electrodeposition was electrochemically tested in 4mol / L KOH aqueous solution, the reference electrode was Hg / HgO electrode, the test potential window was -1.1~0V, and the measured mass specific capacity was 255F / g.

Embodiment 3

[0061] Operation process and other conditions are all consistent with embodiment one, and different condition parameters are as follows:

[0062] A stainless steel sheet is used as the current collector of the working electrode. First, the stainless steel sheet is polished with 800-grit sandpaper, then ultrasonically cleaned with acetone and deionized water, rinsed with alcohol, and then dried. Fe 2 (SO 4 ) 3 Formulated with TEA as Fe +3 and TEA are 0.005 and 0.006mol / L mixed liquid system Fe-TEA respectively; then prepare 0.2mol / L NaOH solution, the electrodeposition temperature is 30 ℃, and the number of cycles is 10, and the composite electrode obtained is deposited in 4mol / L KOH The electrochemical test is carried out in aqueous solution, the reference electrode is Hg / HgO electrode, the test potential window is -1.1~0V, and the measured mass specific capacity is 415F / g.

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Abstract

The present invention relates to a kind of Fe 3 o 4 Composite electrode with graphene oxide (GO) and its preparation method and application; belongs to the field of electrochemical technology. The preparation of the composite electrode is through electrodeposition technology, using a uniform and stable mixed solution formed by a ferric salt solution, a specific complexing agent, and a GO dispersion as an electrodeposition solution, and directly depositing it on the current collector to obtain a composite electrode. The invention has many advantages such as simple preparation process, mild conditions, stable system, fast preparation speed and excellent performance, and is suitable for industrialized production.

Description

technical field [0001] The invention relates to a negative electrode of a supercapacitor, a preparation method and application thereof, and belongs to the technical field of electrochemistry. Background technique [0002] In order to improve the performance of supercapacitors, that is, to maintain the advantages of high specific power while increasing the specific energy, and to have good cycle stability, the current research on transition metal oxide cathode materials for supercapacitors has achieved remarkable results. The specific capacitance of the material can even reach more than 2000F / g. However, from the perspective of preparing high specific energy devices, there is still a lack of negative electrode materials that can be used in conjunction with these high specific capacitance positive electrode materials. At present, the general capacity of carbon materials widely used as negative electrodes can only reach about 200F / g. If these carbon material negative electrode...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/30H01G11/36H01G11/46H01G11/86
CPCH01G11/30H01G11/36H01G11/46H01G11/86Y02E60/13
Inventor 陈亚关杰豪刘咏曹利涛练平石西昌
Owner CENT SOUTH UNIV