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Preparation method of nickel cobaltite porous micron belt/foamed nickel composite electrode material

A composite electrode and nickel foam technology, which is applied in the field of preparation of inorganic non-metallic materials, can solve the problems of not being able to effectively improve the conductivity of nickel cobalt oxide electrode materials, and achieve excellent electrochemical properties, improved utilization, and low impurity content. Effect

Inactive Publication Date: 2016-04-06
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, none of these methods can effectively improve the conductivity of nickel cobalt oxide electrode materials, so it is still a challenge to develop an effective method to improve the conductivity of nickel cobalt oxide electrode materials.

Method used

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  • Preparation method of nickel cobaltite porous micron belt/foamed nickel composite electrode material
  • Preparation method of nickel cobaltite porous micron belt/foamed nickel composite electrode material
  • Preparation method of nickel cobaltite porous micron belt/foamed nickel composite electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Immerse the clean nickel foam into 1.0mol / L oxalic acid aqueous solution, and add the mixed aqueous solution of nickel nitrate and cobalt nitrate dropwise to the oxalic acid aqueous solution under the condition of temperature of 25°C and stirring speed of 100 rpm, in which the nitric acid The molar concentration of nickel is 0.25mol / L, the molar concentration of cobalt nitrate is 0.5mol / L, the dropping rate is 120 drops / min, and the final molar ratio of nickel nitrate and oxalic acid is 1:30. The stirring reaction time was 10 minutes. After the reaction, the nickel foam was taken out and washed, then put into an oven with a programmed temperature increase rate of 5°C / min, and dried at 100°C for 2 hours. Then put it in a muffle furnace for calcination, the calcination time is 2.5 hours, the calcination temperature is 350° C., and the heating rate is 10° C. / minute. After natural cooling, the nickel cobaltate porous micron whisker array / foam nickel composite electrode mat...

Embodiment 2

[0038] Immerse the clean nickel foam into 1.5mol / L oxalic acid aqueous solution, and add the mixed aqueous solution of nickel nitrate and cobalt nitrate dropwise to the oxalic acid aqueous solution under the condition of temperature of 25°C and stirring speed of 100 rpm, in which the nitric acid The molar concentration of nickel is 0.25mol / L, the molar concentration of cobalt nitrate is 0.5mol / L, the dropping rate is 120 drops / min, and the final molar ratio of nickel nitrate and oxalic acid is 1:10. The stirring reaction time was 15 minutes. After the reaction, the nickel foam was taken out and washed, then put into an oven with a programmed temperature increase rate of 5°C / min, and dried at 100°C for 2 hours. Then put it in a muffle furnace for calcination, the calcination time is 2.5 hours, the calcination temperature is 350° C., and the heating rate is 10° C. / minute. After natural cooling, the nickel cobaltate porous micron whisker array / foam nickel composite electrode mat...

Embodiment 3

[0041] Immerse the clean nickel foam into 0.1mol / L oxalic acid aqueous solution, and add the mixed aqueous solution of nickel nitrate and cobalt nitrate dropwise to the oxalic acid aqueous solution under the condition of temperature of 25°C and stirring speed of 100 rpm, in which the nitric acid The molar concentration of nickel is 0.5mol / L, the molar concentration of cobalt nitrate is 1.0mol / L, the dropping rate is 60 drops / min, and the final molar ratio of nickel nitrate and oxalic acid is 1:6. The stirring reaction time was 30 minutes. After the reaction, the nickel foam was taken out and washed, then put into an oven with a programmed temperature increase rate of 5°C / min, and dried at 100°C for 2 hours. Then put it in a muffle furnace for calcination, the calcination time is 2.5 hours, the calcination temperature is 350° C., and the heating rate is 10° C. / minute. After natural cooling, the nickel cobaltate porous micron whisker array / foam nickel composite electrode materi...

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Abstract

The invention belongs to the inorganic non-metal material preparation field and relates to a preparation method of a nickel cobaltite porous micron belt / foamed nickel composite electrode material. The preparation method includes the following steps that: clean foamed nickel is immersed in an oxalic acid aqueous solution; a soluble nickel salt and soluble cobalt salt mixed aqueous solution is added in an obtained solution dropwise under stirring at room temperature; stirring is performed until a micron structure precursor grows from the surface of the foamed nickel through a reaction; the foamed nickel is removed out, and cleaning, drying and calcining are performed sequentially, so that the nickel cobaltite porous micron belt / foamed nickel composite electrode material can be obtained. The preparation method of the invention has the advantages of simple and feasible process, high product purity and low production cost. With the method adopted, an obtained product has a novel appearance, and is firmly grown on the surface of the high-conductivity foamed nickel; the thickness of the nickel cobaltite porous micron belt ranges from 50 to 80 nm, and the length of the nickel cobaltite porous micron belt ranges from 3 to 5 microns, and the width of the nickel cobaltite porous micron belt ranges from 300 to 500 microns, and the size of a nano pore ranges from 5 to 20nm; and the homogeneity and dispersity of the product are excellent.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic non-metallic materials, and in particular relates to a preparation method of nickel cobalt oxide porous micro-belt / foam nickel composite electrode material. Background technique [0002] Supercapacitors have the advantages of high power density, short charging time, long service life, and good stability, and are widely used in electric vehicles, military, mobile communication equipment and other fields, and have recently attracted widespread attention from scientific researchers. Supercapacitors can be divided into electrochemical double layer capacitors and Faraday pseudocapacitors in principle. Common carbon materials have been used in electrochemical double-layer capacitors due to their high specific surface area, low cost, and long cycle life, but their low specific capacitance severely limits the commercial development of carbon-based electrode materials; bimetallic oxides ar...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/24H01G11/30
CPCY02E60/13H01G11/86H01G11/24H01G11/30
Inventor 许家胜张杰刘娇辛丽莹苏红玉钱建华刘琳
Owner BOHAI UNIV
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