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Bimetallic nickel-cobalt telluride supercapacitor electrode material and preparation method thereof

An electrode material and telluride technology, which is used in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, etc., can solve the problems of unreported preparation methods of nickel-cobalt bimetallic tellurides, and achieve improved electrochemical performance, fast ionization, etc. / Electron transport, the effect of increasing the specific surface area

Inactive Publication Date: 2020-02-07
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Transition metal tellurides with different morphologies can be prepared on different substrates by the above method, but there is no report on the preparation method of nickel-cobalt double metal tellurides

Method used

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  • Bimetallic nickel-cobalt telluride supercapacitor electrode material and preparation method thereof
  • Bimetallic nickel-cobalt telluride supercapacitor electrode material and preparation method thereof
  • Bimetallic nickel-cobalt telluride supercapacitor electrode material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] First, the nickel-cobalt precursor was grown on the nickel foam substrate, and 0.3mmol Ni 2+ and 0.6mmol Co 2+ Dissolve in 60mL ethanol, then add 1.1mmol urea, stir magnetically for 15 minutes to obtain a homogeneous solution. The solution and the cleaned nickel foam were placed in a high-pressure reactor and reacted at 120°C for 8 hours. After cooling to room temperature, the nickel foam was taken out, washed several times with ethanol and deionized water, and dried overnight in an oven at 70°C.

[0030] The second is to prepare nickel cobalt telluride. Prepare 70 ml of 1 mM sodium tellurite aqueous solution, add 5 ml of hydrazine hydrate (80%), and stir magnetically for 30 minutes. The solution was transferred to an autoclave, and nickel foam loaded with nickel-cobalt precursor was put into it at the same time, and the tellurization reaction was carried out at 180° C. for 8 hours. After cooling to room temperature, the nickel foam was taken out, washed several tim...

Embodiment 2

[0032] The implementation process is the same as in Example 1, except that the tellurization reaction time is 12 hours. An electrode material that supports nickel-cobalt-tellurium nanotubes on nickel foam is obtained. See attached figure 2 in b.

Embodiment 3

[0034] The implementation process is the same as in Example 1, except that the tellurization reaction time is 15 hours. An electrode material that supports nickel-cobalt-tellurium nanotubes on nickel foam is obtained. See attached figure 2 in c.

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Abstract

The invention discloses a bimetallic nickel-cobalt telluride supercapacitor electrode material and a preparation method thereof, and belongs to the technical field of energy storage materials. The method comprises the steps of: taking urea as a precipitant, growing free Ni2+ and Co2+ in a Ni2+ and Co2+ mixed solution on a conductive substrate to form a nickel-cobalt precursor; then, allowing the conductive substrate with the nickel-cobalt precursor to enter a reductive aqueous solution containing sodium tellurite and hydrazine hydrate, and after Te4+ is reduced by hydrazine hydrate, forming abimetallic nickel-cobalt telluride through an ion exchange reaction; and obtaining nickel-cobalt precursors with different morphologies by adjusting a solvent of a Ni2+ and Co2+ mixed solution, and regulating and controlling the morphology of the bimetallic nickel-cobalt telluride by adjusting the concentration of sodium tellurite in a reductive aqueous solution and adjusting the reaction time. The morphology of the final product bimetallic nickel-cobalt telluride on the conductive substrate is one or more of a nanosheet, a nanoneedle, a nanotube and a nanorod. The electrochemical performanceis improved.

Description

Technical field: [0001] The invention belongs to the technical field of energy storage materials, and relates to a transition metal compound electrode material, in particular to a bimetallic nickel-cobalt telluride supercapacitor electrode material and a preparation method thereof. Background technique: [0002] As a kind of energy storage device, supercapacitor has the advantages of ultra-high power density, fast charge / discharge rate, long cycle life, and high safety. However, the energy density of commercially available supercapacitors is much lower than that of batteries and fuel cells. Therefore, it is imminent to increase its energy density without losing its power density, and the preparation of hybrid supercapacitors is one of the effective methods to solve the above problems. Hybrid supercapacitors consist of battery-type electrodes and capacitive electrodes. Among them, battery-type electrodes bring high energy, while capacitive-type electrodes provide high power...

Claims

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Application Information

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IPC IPC(8): H01G11/26H01G11/30H01G11/86
CPCH01G11/26H01G11/30H01G11/86Y02E60/13
Inventor 杨冬芝张诗宜于中振
Owner BEIJING UNIV OF CHEM TECH
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