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Sodium doped "bow tie" nickel-cobalt pyrophosphate composite electrode material and preparation method thereof

A composite electrode, bow-tie technology, used in hybrid capacitor electrodes, hybrid/electric double-layer capacitor fabrication, nanotechnology for materials and surface science, etc.

Inactive Publication Date: 2019-12-06
ANYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on metal phosphate as an electrode material. Combining electrode materials is an effective strategy and way to improve the performance of supercapacitors.

Method used

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  • Sodium doped "bow tie" nickel-cobalt pyrophosphate composite electrode material and preparation method thereof
  • Sodium doped "bow tie" nickel-cobalt pyrophosphate composite electrode material and preparation method thereof
  • Sodium doped "bow tie" nickel-cobalt pyrophosphate composite electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] ①Add 0.0550g nickel nitrate hexahydrate, 0.0550g cobalt nitrate hexahydrate, 0.776g sodium tartrate and 0.150g triammonium phosphate into 20.0mL distilled water, stir and mix well, transfer the above reaction solution to the reaction kettle, and heat Under the condition of hydrothermal reaction for 24 hours, after the completion of the reaction, naturally cool to room temperature, the product is centrifuged, washed several times with absolute ethanol and distilled water and dried, and the "bow tie" precursor compound can be obtained.

[0022] ②Put the "bow tie" precursor compound prepared in step ① on a clean and dry porcelain boat, put it into a tube furnace, and calcinate it at 650°C for 0.5h in an air atmosphere. After the reaction, the tube furnace The furnace is naturally cooled to room temperature, and the sodium-doped "bowtie"-shaped nickel-cobalt pyrophosphate composite electrode material can be finally obtained.

[0023] attached figure 1 The field emission sc...

Embodiment 2

[0026] ① Add 0.0291g nickel nitrate hexahydrate, 0.0869g cobalt nitrate hexahydrate, 0.970g sodium tartrate and 0.150g triammonium phosphate into 20.0mL distilled water, stir and mix well, transfer the above reaction solution to the reaction kettle, and heat Under the condition of hydrothermal reaction for 24 hours, after the reaction, naturally cool to room temperature, the product is centrifuged, washed several times with absolute ethanol and distilled water and dried, and the "bow tie" precursor compound can be obtained.

[0027] ②Put the "bow tie" precursor compound prepared in step ① on a clean and dry porcelain boat, put it into a tube furnace, and calcinate it at 600°C for 0.5h in an air atmosphere. After the reaction, tube The furnace is naturally cooled to room temperature, and the sodium-doped "bowtie"-shaped nickel-cobalt pyrophosphate composite electrode material can be finally obtained.

Embodiment 3

[0029] ① Add 0.0872g nickel nitrate hexahydrate, 0.0288g cobalt nitrate hexahydrate, 1.164g sodium tartrate and 0.300g triammonium phosphate into 20.0mL distilled water, stir and mix well, transfer the above reaction solution to the reaction kettle, and heat Under the condition of hydrothermal reaction for 24 hours, after the reaction, naturally cool to room temperature, the product is centrifuged, washed several times with absolute ethanol and distilled water and dried, and the "bow tie" precursor compound can be obtained.

[0030] ②Put the "bow tie" precursor compound prepared in step ① on a clean and dry porcelain boat, put it into a tube furnace, and calcinate it at 550°C for 0.5h in an air atmosphere. After the reaction, the tube furnace The furnace is naturally cooled to room temperature, and the sodium-doped "bowtie"-shaped nickel-cobalt pyrophosphate composite electrode material can be finally obtained.

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Abstract

The invention discloses a sodium-doped bowtie-shaped nickel pyrophosphate-cobalt composite electrode material and a preparation method thereof, which belong to the technical field of preparation of functional materials. In the method, with cobalt nitrate, nickel nitrate, sodium tartrate and ammonium phosphate as raw materials and with distilled water as a solvent, a hydrothermal method is adoptedto prepare a bowtie-shaped precursor complex, the precursor complex is subjected to high-temperature calcination in an air atmosphere, and thus, a sodium-doped bowtie-shaped nickel pyrophosphate-cobalt composite electrode material can be prepared. The prepared sodium-doped bowtie-shaped nickel pyrophosphate-cobalt composite electrode material is formed by assembling of nanoparticles, and the surface is rough, loose and porous. Under 4.0 Ag<-1>, after 2000 cycles of reciprocating charging and discharging, the capacitance can still reach 98.9% the initial value. The method disclosed in the invention has the advantages of easy operation, low cost, high yield and good reproducibility.

Description

technical field [0001] The invention relates to a sodium-doped "bow tie"-shaped nickel-cobalt pyrophosphate composite electrode material and a preparation method thereof, belonging to the technical field of preparation of functional materials. Background technique [0002] The depletion of traditional fossil fuels (coal, oil, natural gas, etc.) and the environmental problems caused by their rapid consumption have attracted increasing public attention. Therefore, seeking to develop new energy sources has become an urgent task today. Electrochemical energy devices are important devices for utilizing new energy sources. As a new type of electrochemical energy storage device, supercapacitors are favored by researchers due to their fast charge and discharge capabilities, long cycle life, and low manufacturing costs. . For a long time, the electrolyte and the electrode material are the two major factors that affect the performance of the supercapacitor. Due to the limited select...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/30H01G11/46B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G11/24H01G11/30H01G11/46H01G11/86Y02E60/13
Inventor 魏成振程承杜记民张道军杜卫民
Owner ANYANG NORMAL UNIV
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