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A kind of pseudocapacitor electrode based on nickel cobalt sulfide and preparation method thereof

A pseudocapacitor, nickel-cobalt sulfide technology, applied in the field of electrodes, can solve problems such as poor cycle stability, difficult application requirements, and low energy density, and achieve the effects of increasing energy density, improving cycle stability, and high specific capacity

Active Publication Date: 2019-04-23
重庆中科超容科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, it is found that due to the low conductivity, poor cycle stability and low energy density of transition metal oxide or hydroxide electrode materials, due to the existence of these defects, it is difficult to meet the requirements in reality. higher application requirements

Method used

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  • A kind of pseudocapacitor electrode based on nickel cobalt sulfide and preparation method thereof
  • A kind of pseudocapacitor electrode based on nickel cobalt sulfide and preparation method thereof
  • A kind of pseudocapacitor electrode based on nickel cobalt sulfide and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A pseudocapacitor electrode based on a nickel-cobalt sulfide three-dimensional hierarchical nanostructure of the present embodiment is prepared as follows:

[0031] (1) Soak the foamed nickel with concentrated hydrochloric acid, then wash with water and an organic solvent to remove oxides and grease on the foamed nickel surface;

[0032] (2) Weigh 0.1molNi(NO 3 ) 2 ·6H 2 O, 1molCo(NO 3 ) 2 ·6H 2 O, 4.4mol Na 2 SO 4 Dissolved in an aqueous solution to obtain a mixed solution;

[0033] (3) Add the mixed solution in step (2) to the hydrothermal kettle containing nickel foam in step (1) to react, and make nickel foam containing cobalt nickel hydroxide nanosheets, wherein the nickel hydroxide nanosheets Located on nickel foam and interconnected in a honeycomb shape;

[0034] (4) the foamed nickel containing cobalt-nickel hydroxide nano-sheets prepared in step (3) is placed in sodium sulfide solution and reacted in a hydrothermal kettle, so that the cobalt-nickel hyd...

Embodiment 2

[0037] A pseudocapacitor electrode based on a nickel-cobalt sulfide three-dimensional hierarchical nanostructure of the present embodiment is prepared as follows:

[0038] (1) Soak the foamed nickel with concentrated hydrochloric acid, then wash with water and an organic solvent to remove oxides and grease on the foamed nickel surface;

[0039] (2) Weigh 1molNi(NO 3 ) 2 ·6H 2 O, 1molCo(NO 3 ) 2 ·6H 2 O, 4mol Na 2 SO 4 Dissolved in an aqueous solution to obtain a mixed solution;

[0040] (3) Add the mixed solution in step (2) to the hydrothermal kettle containing nickel foam in step (1) to react, and make nickel foam containing cobalt nickel hydroxide nanosheets, wherein the nickel hydroxide nanosheets Located on nickel foam and interconnected in a honeycomb shape;

[0041] (4) the foamed nickel containing cobalt-nickel hydroxide nano-sheets prepared in step (3) is placed in sodium sulfide solution and reacted in a hydrothermal kettle, so that the cobalt-nickel hydroxi...

Embodiment 3

[0044]A pseudocapacitor electrode based on a nickel-cobalt sulfide three-dimensional hierarchical nanostructure of the present embodiment is prepared as follows:

[0045] (1) Soak the foamed nickel with concentrated hydrochloric acid, then wash with water and an organic solvent to remove oxides and grease on the foamed nickel surface;

[0046] (2) Weigh 1molNi(NO 3 ) 2 ·6H 2 O, 0.2molCo(NO 3 ) 2 ·6H 2 O, 1.2mol Na 2 SO 4 Dissolved in an aqueous solution to obtain a mixed solution;

[0047] (3) Add the mixed solution in step (2) to the hydrothermal kettle containing nickel foam in step (1) to react, and make nickel foam containing cobalt nickel hydroxide nanosheets, wherein the nickel hydroxide nanosheets Located on nickel foam and interconnected in a honeycomb shape;

[0048] (4) the foamed nickel containing cobalt-nickel hydroxide nano-sheets prepared in step (3) is placed in thiourea solution and reacted in a hydrothermal kettle, so that cobalt-nickel hydroxide nano...

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Abstract

The invention relates to a pseudo capacitor electrode based on a nickel / cobalt sulfide three-dimensional hierarchical nanostructure and a preparation method thereof. The electrode comprises a nickel foam substrate and multiple nickel / cobalt sulfide nanosheets located on the nickel foam substrate. The nickel / cobalt sulfide nanosheets are mutually connected and are honeycomb. Multiple nanoscale holes are distributed on each nickel / cobalt sulfide nanosheet. The preparation method comprises the steps of 1), preparing the foam nickel containing cobalt / nickel hydroxide nanosheets through a hydrothermal method, wherein the cobalt / nickel hydroxide nanosheets are located on the foam nickel, are mutually connected and are honeycomb; 2), processing the foam nickel containing cobalt / nickel hydroxide nanosheets obtained in the step 1) through a sulfidization method, thereby transforming the cobalt / nickel hydroxide nanosheets into cobalt / nickel sulfide nanosheets; and 3), constructing evenly distributed nanoscale holes on the nickel / cobalt sulfide nanosheets through an alkali solution etching method. The method is simple in technology and low in cost. The prepared electrode has the three-dimensional hierarchical nanostructure, very high specific capacitance, good rate capability and excellent cyclic stability.

Description

technical field [0001] The invention belongs to the field of electrodes, in particular to a pseudocapacitor electrode based on a nickel-cobalt sulfide three-dimensional hierarchical nanostructure and a preparation method thereof. Background technique [0002] Due to its high power density, fast charge and discharge and cycle stability, supercapacitors are not only used in the field of consumer electronics, but also in new energy vehicles, solar energy power generation, smart grids, electric power, railways, communications, national defense and other fields. Wide range of applications. The development of electrode materials is the main direction of supercapacitor technology research at present, and the charge storage capacity of electrode materials directly determines the capacitance of supercapacitors. Compared with traditional carbon-based electrode materials, electrode materials such as transition metal oxides or hydroxides have higher charge storage capabilities. Howeve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/26H01G11/86
CPCY02E60/13
Inventor 李振湖刘双翼陆文强李徐向路
Owner 重庆中科超容科技有限公司
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