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Metal/amorphous nickel-cobalt hydroxide composite electrode for super capacitor and preparation method thereof

A nickel-cobalt hydroxide, supercapacitor technology, applied in hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, etc., can solve the problems of limited electrochemical performance, poor high current charge and discharge rate characteristics, etc., to ensure electrochemical performance. performance, improved charge exchange and transfer rates, improved mass specific capacity and effect of cycling stability

Inactive Publication Date: 2016-06-08
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the charging and discharging process, pseudocapacitive electrode materials are limited by the ion orientation and charge migration rate of the electrolyte, and their rate characteristics of high current charging and discharging are poor, which limits the further improvement of their electrochemical performance.

Method used

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  • Metal/amorphous nickel-cobalt hydroxide composite electrode for super capacitor and preparation method thereof
  • Metal/amorphous nickel-cobalt hydroxide composite electrode for super capacitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]First, a 20nm-thick silver electrode was vapor-deposited on one end of the porous alumina template as the negative electrode for electrodeposition. Secondly, 20 ml of 0.02 mol / L nickel sulfate aqueous solution and 20 ml of 0.01 mol / L copper sulfate aqueous solution were measured and mixed uniformly as precursors for the preparation of nickel-copper alloy nanowires by electrodeposition. Then, nickel-copper alloy nanowires were prepared by in-situ electrodeposition on porous alumina templates by a three-electrode method. Among them, silver-plated porous alumina was used as the working electrode, a Pt sheet of 2cm*2cm*0.2mm was used as the counter electrode, and a saturated calomel electrode was used as the reference electrode. Turn on a DC voltage of 1V, and conduct electrodeposition for 5min at 25°C. Then, the obtained samples were cleaned with deionized water or ethanol of analytical grade, and then soaked in a mixed solution with a volume fraction of 50% phosphoric aci...

Embodiment 2

[0043] According to the steps described in Example 1, a layer of silver electrode with a thickness of 20 nm was vapor-deposited on one end of the porous alumina template as a negative electrode for electrodeposition. Then, 20 ml of 0.02 mol / L nickel sulfate aqueous solution and 20 ml of 0.01 mol / L copper sulfate aqueous solution were measured and mixed uniformly as precursors for the preparation of nickel-copper alloy nanowires by electrodeposition. Then, nickel-copper alloy nanowires were prepared by in-situ electrodeposition on porous alumina templates by three-electrode method. Among them, silver-plated porous alumina was used as the working electrode, a 2cm*2cm*0.0.02mol / L Pt sheet was used as the counter electrode, and a saturated calomel electrode was used as the reference electrode. Turn on a DC voltage of 1V, and conduct electrodeposition for 5min at 25°C. Then the obtained samples were cleaned with deionized water and ethanol, and then immersed in a mixed solution wi...

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Abstract

The invention discloses a preparation method of a metal / amorphous nickel-cobalt hydroxide composite electrode for a super capacitor. The method comprises the following steps: (1) preparing an electro-deposition cathode; (2) preparing a metal / alloy nanowire; (3) removing a support substrate of the metal / alloy nanowire; (4) electrodepositing a nickel-cobalt hydroxide on the metal / alloy nanowire; and (5) obtaining the metal / amorphous nickel-cobalt hydroxide composite electrode. Meanwhile, the invention also discloses a composite electrode prepared by the preparation method. Compared with the prior art, the composite electrode can effectively improve the specific mass capacity and cycling stability of the super capacitor and has very high practical values and broad application prospects.

Description

technical field [0001] The invention relates to a composite electrode used in a supercapacitor, in particular to a metal / amorphous nickel-cobalt hydroxide composite electrode for a supercapacitor and a preparation method thereof. Background technique [0002] Supercapacitors not only have the advantages of high power density, high energy density, and fast charge and discharge rate, but also have the advantages of high efficiency, long cycle life, green electrode materials, and wide operating temperature range. They are used in information technology, mobile communications, electric vehicles, Fields such as hybrid fuel vehicles, aerospace and national defense technology have huge market potential and are scientific research hotspots in today's society. [0003] According to different charge storage mechanisms, supercapacitors can be divided into electric double layer capacitors and pseudocapacitive capacitors. Among the electrode materials of electric double-layer capacitors...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/86
CPCY02E60/13H01G11/30H01G11/86
Inventor 赵晓冲程禹杨盼杨丽军郝亚伟马策
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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