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A pseudocapacitor positive electrode based on cobalt-nickel sulfide and its preparation method

A cobalt nickel sulfide and pseudocapacitor technology, applied in the field of electrodes, can solve the problems of reducing electrode conductivity and ion mobility, unable to achieve high-rate charge and discharge, and not having practical value, etc., to increase the available active surface and achieve rapid Good effect of charge and discharge, area specific capacity

Active Publication Date: 2019-04-19
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, this technology deposits nickel-cobalt oxide with poor conductivity on the outer surface, which reduces the overall conductivity and ion mobility of the electrode, resulting in poor rate performance of the electrode, and cannot achieve high-rate charge and discharge, hindering the improvement of performance. And its complicated preparation process has caused higher production cost, does not have practical value

Method used

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  • A pseudocapacitor positive electrode based on cobalt-nickel sulfide and its preparation method
  • A pseudocapacitor positive electrode based on cobalt-nickel sulfide and its preparation method
  • A pseudocapacitor positive electrode based on cobalt-nickel sulfide and its preparation method

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Embodiment 1

[0033] A positive electrode of a pseudocapacitor based on a cobalt-nickel sulfide core-shell three-dimensional multilevel nanostructure in this embodiment is prepared as follows:

[0034] 1) Soak the nickel foam with concentrated hydrochloric acid, then wash with acetone, ethanol and water to remove oxides and grease on the surface of the nickel foam;

[0035] 2) Weigh 1mol Co(NO 3 ) 2 ·6H 2 O, 0.1mol Ni(NO 3 ) 2 ·6H 2 O, 4.4mol Na 2 SO 4 Add water containing ethanol to prepare a mixed solution, the volume ratio of ethanol and water is 1:10.

[0036] 3) adding the mixed solution in step 2) into a hydrothermal kettle containing nickel foam treated in step 1) for reaction, to obtain nickel foam containing cobalt nickel hydroxide nanosheets,

[0037] 4) the foamed nickel containing cobalt-nickel hydroxide nanosheets prepared in step (3) is placed in a sodium sulfide solution and reacted in a hydrothermal kettle, so that the cobalt-nickel hydroxide nanosheets are converted...

Embodiment 2

[0040] A positive electrode of a pseudocapacitor based on a cobalt-nickel sulfide core-shell three-dimensional multilevel nanostructure in this embodiment is prepared as follows:

[0041] 1) Soak the nickel foam with concentrated hydrochloric acid, then wash with acetone, ethanol and water to remove oxides and grease on the surface of the nickel foam;

[0042] 2) Weigh 1mol Co(NO 3 ) 2 ·6H 2 O, 1mol Ni(NO 3 ) 2 ·6H 2 O, 4mol Na 2 SO 4 Add water containing ethanol to prepare a mixed solution, the volume ratio of ethanol and water is 0.5:10.

[0043] 3) adding the mixed solution in step 2) into a hydrothermal kettle containing nickel foam treated in step 1) for reaction, to obtain nickel foam containing cobalt nickel hydroxide nanosheets,

[0044] 4) The nickel foam containing the cobalt-nickel hydroxide nanosheets prepared in step (3) is placed in a thiourea solution and reacted in a hydrothermal kettle, so that the cobalt-nickel hydroxide nanosheets are converted into ...

Embodiment 3

[0047] A positive electrode of a pseudocapacitor based on a cobalt-nickel sulfide core-shell three-dimensional multilevel nanostructure in this embodiment is prepared as follows:

[0048] 1) Soak the nickel foam with concentrated hydrochloric acid, then wash with acetone, ethanol and water to remove oxides and grease on the surface of the nickel foam;

[0049] 2) Weigh 0.2mol Co(NO 3 ) 2 ·6H 2 O, 1mol Ni(NO 3 ) 2 ·6H 2 O, 1.2mol Na 2 SO 4 Add water containing ethanol to prepare a mixed solution, the volume ratio of ethanol and water is 0.8:10.

[0050] 3) adding the mixed solution in step 2) into a hydrothermal kettle containing nickel foam treated in step 1) for reaction, to obtain nickel foam containing cobalt nickel hydroxide nanosheets,

[0051] 4) The nickel foam containing the cobalt-nickel hydroxide nanosheets prepared in step (3) is placed in a thiourea solution and reacted in a hydrothermal kettle, so that the cobalt-nickel hydroxide nanosheets are converted i...

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Abstract

The invention discloses a pseudocapacitor anode based on a three-dimensional multi-level nanostructure of cobalt-nickel sulfide core shell and a preparation method of the pseudocapacitor anode. The anode comprises a foamed nickel substrate 1, cobalt-nickel sulfide nanosheets 2 positioned on the foamed nickel substrate 1 and distributed in an array manner and cobalt-nickel sulfide blades 3 connected to the two sides of the cobalt-nickel sulfide nanosheets 2 and distributed in a growing array manner, wherein the cobalt-nickel sulfide nanosheets 2 are perpendicular to the foamed nickel substrate 1; the cobalt-nickel sulfide blades 3 and the cobalt-nickel sulfide nanosheets 2 are in the opposite directions along the foamed nickel substrate 1 by 0 to 90 degrees. According to the disclosed anode structure, the cobalt-nickel sulfide nanosheet array is directly grown on the highly conductive foam nickel substrate, so that the anode has the very high electron mobility and is beneficial to realization of rapid charge and discharge; meanwhile, the cobalt-nickel sulfide blades are continuously grown on the nanosheet array in situ, so that the available active surface of an electrode can be expanded, the energy density of the electrode can be increased, and the action speed of an active material and an electrolyte can be increased.

Description

technical field [0001] The invention belongs to the field of electrodes, and in particular relates to a pseudocapacitor anode based on a cobalt-nickel sulfide core-shell three-dimensional multilevel nanostructure and a preparation method thereof. Background technique [0002] At present, the whole world is facing a serious energy crisis. To solve this problem, researchers have developed a large number of energy storage devices based on electrochemical storage. 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. Not only 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 othe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/26H01G11/28H01G11/30H01G11/86
CPCY02E60/13
Inventor 李振湖刘双翼李徐向路陆文强
Owner 重庆中科超容科技有限公司
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