Preparation method of active nano porous nickel/nickel oxide load ultra-thin nickel cobaltate nanosheet flexible electrode material

A nanoporous nickel and flexible electrode technology, which is applied in the manufacture of hybrid/electric double layer capacitors, nanotechnology, nanotechnology, etc., can solve the problems of difficult control of the coating process, uneven distribution of active materials, and increased recycling costs. Rich usage scenarios, shortened experiment cycle, good flexibility effect

Active Publication Date: 2019-10-25
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nickel cobaltate powder material obtained in this patent needs to be coated on the current collector before it can be used. The coating process is not easy to control, which will lead to uneven distribution of active substances; and a large amount of organic solution is used in the preparation process, which increases the recycling cost.

Method used

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  • Preparation method of active nano porous nickel/nickel oxide load ultra-thin nickel cobaltate nanosheet flexible electrode material
  • Preparation method of active nano porous nickel/nickel oxide load ultra-thin nickel cobaltate nanosheet flexible electrode material
  • Preparation method of active nano porous nickel/nickel oxide load ultra-thin nickel cobaltate nanosheet flexible electrode material

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Embodiment 1

[0039] The invention provides a method for preparing an active nanoporous nickel / nickel oxide loaded ultra-thin nickel cobaltate nanosheet composite electrode material, which mainly includes the following steps:

[0040] S1: Select the alloy composition as Ni 40 Zr 20 Ti 40 , the amorphous strip with a size of 2cm × 2mm × 20μm was used as a precursor, which was ultrasonically cleaned with absolute ethanol, and soaked in a mixed solution after cleaning (40ml 0.05M HF solution and 10ml 5% H 2 o 2 After the solution is mixed, obtain) free dealloying for 4h to obtain a nanoscale porous nickel / nickel oxide template;

[0041] S2: Under the three-electrode system, the template prepared in S1 was used as the working electrode, the metal Pt sheet was used as the counter electrode, and the Ag / AgCl electrode was used as the reference electrode, and the solution mixed with cobalt nitrate hexahydrate and urea at a concentration ratio of 10:1 was used as The electrolyte, wherein the mol...

Embodiment 2

[0048] S1: Select Ni with a size of 1cm×1.5mm×25μm 40 Zr 20 Ti 40 The amorphous strip is the precursor, and it is ultrasonically cleaned with absolute ethanol. After cleaning, it is soaked in 40ml of 0.05M HF solution and 10ml of 5% H 2 o 2 Free dealloying in the mixed solution for 4 hours to obtain a nanoscale porous nickel / nickel oxide template;

[0049] S2: Under the three-electrode system, the template made in S1 is used as the working electrode, the metal Pt sheet is used as the counter electrode, the Ag / AgCl electrode is used as the reference electrode, and the solution mixed with cobalt nitrate hexahydrate and urea at a ratio of 8:1 is used as the electrolysis solution, wherein the molar concentration of cobalt nitrate hexahydrate is 6mM, and cobalt hydroxide nanosheets are deposited on the surface of nanoporous nickel. The deposition potential is -1.2V, and the time is 30min;

[0050] S3: Rinse the material prepared in S2 with deionized water for 3 to 4 times, pla...

Embodiment 3

[0054] S1: Select Ni with a size of 5cm×3mm×30μm 40 Zr 20 Ti 40 The amorphous strip is the precursor, and it is ultrasonically cleaned with absolute ethanol. After cleaning, it is soaked in 40ml of 0.05M HF solution and 10ml of 5% H 2 o 2 Free dealloying in the mixed solution for 4 hours to obtain a nanoscale porous nickel / nickel oxide template;

[0055] S2: Under the three-electrode system, the template made in S2 is used as the working electrode, the metal Pt sheet is used as the counter electrode, and the Ag / AgCl electrode is used as the reference electrode, and the ratio of cobalt nitrate hexahydrate, nickel nitrate hexahydrate, and urea is 5:1. The mixed solution is an electrolyte, wherein the molar concentration of cobalt nitrate hexahydrate is 3mM, and cobalt hydroxide nanosheets are deposited on the nanoporous nickel surface. The deposition potential is -1.5V, and the time is 60min;

[0056] S3: Rinse the material prepared in S2 with deionized water for 3 to 4 tim...

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Abstract

The invention relates to a preparation method of an active nano porous nickel/nickel oxide load ultra-thin nickel cobaltate nanosheet flexible electrode material. The method is characterized in that nano porous nickel prepared by natural dealloying is utilized as a template, through three-electrode electrochemical deposition, an ultra-thin ultra-fine nickel cobaltate nanosheet is grown on a surface of the nanoporous nickel and then heated to obtain the ultrathin nickel cobaltate nanosheet flexible electrode material. The method is advantaged in that firstly, the nickel cobaltate nanosheet is constructed on the surface of the nano porous template, close combination of the nickel cobaltate nanosheet and nano pores is achieved, and improvement of cycle stability is facilitated; the prepared nickel cobaltate nanosheet is ultra-thin and ultra-fine, has thickness of only 10-20 nm, has a larger effective specific surface area when participating in electrode reaction, has more active sites andrepresents better electrochemical performance.

Description

Technical field: [0001] The invention belongs to the field of preparation of supercapacitor electrode materials, in particular to a preparation method and application of a nanoporous nickel / nickel oxide loaded ultrathin nickel cobaltate nanosheet composite electrode material. Background technique: [0002] With the depletion of non-renewable energy such as fossil fuels, the development of green and sustainable energy is imminent. New energy sources such as tidal energy, solar energy, and wind energy have been fully developed, and energy storage devices are used for the storage and transmission of these energies. Therefore, finding an energy storage device with low cost, abundant reserves and good electrochemical performance has become the goal of many researchers. Supercapacitors have been favored by many researchers because of their high energy density, extremely fast charge-discharge process, long cycle life, wide operating range, and high safety factor. [0003] For sup...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/46H01G11/26H01G11/24H01G11/66H01G11/68H01G11/70B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G11/24H01G11/26H01G11/46H01G11/66H01G11/68H01G11/70H01G11/86Y02E60/13
Inventor 秦春玲赵峰郑栋辉刘杨王志峰
Owner HEBEI UNIV OF TECH
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