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Preparation method and application of NiCo2S4/graphite felt composition electrode material

A composite electrode and graphite felt technology, applied in the field of nanomaterials and electrochemistry, can solve the problems of rare metal sulfide research

Active Publication Date: 2016-12-07
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there have been many reports on metal oxides and metal hydroxides as electrode materials, such as Co 2 o 3 、NiCo 2 o 4 , Ni(OH) 2 、Co(OH) 2 etc., but the research on metal sulfides as electrode materials is still relatively rare

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  • Preparation method and application of NiCo2S4/graphite felt composition electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A kind of NiCo 2 S 4 / The preparation method of graphite felt composite electrode material, concrete process is as follows:

[0025] (1) Pre-oxidation treatment of graphite felt

[0026] The graphite felt was cut into a rectangle of 2 cm x 2 cm, ultrasonically cleaned with acetone, ethanol, and deionized water for 3 hours, and dried in vacuum at 60 °C for 24 h.

[0027] Prepare 40mL of aqua regia according to the volume ratio of concentrated hydrochloric acid and concentrated nitric acid 3:1, put the cleaned graphite felt into aqua regia, and oxidize at 80°C for 24h, and control the heating rate to 2°C / min. After natural cooling, the graphite felt was washed with deionized water until the pH was neutral, and dried at 60° C. to obtain a pretreated graphite felt.

[0028] (2) Loaded nickel-cobalt precursor

[0029] Configure 60ml mixed solution according to the volume ratio of deionized water and ethanol as 1:1, add nickel chloride and cobalt chloride in the ratio of ...

Embodiment 2

[0035] A kind of NiCo 2 S 4 / The preparation method of graphite felt composite electrode material, concrete process is as follows:

[0036] (1) Pre-oxidation treatment of graphite felt

[0037] The graphite felt was cut into a rectangle of 2 cm x 2 cm, ultrasonically cleaned with acetone, ethanol, and deionized water for 3 hours, and dried in vacuum at 60 °C for 24 h.

[0038] Prepare 40mL of aqua regia according to the volume ratio of concentrated hydrochloric acid and concentrated nitric acid 3:1, put the cleaned graphite felt into aqua regia, and oxidize at 80°C for 24h, and control the heating rate to 2°C / min. After natural cooling, the graphite felt was washed with deionized water until the pH was neutral, and dried at 60° C. to obtain a pretreated graphite felt.

[0039] (2) Loaded nickel-cobalt precursor

[0040]Configure 60ml mixed solution according to the volume ratio of deionized water and ethanol as 1:1, add nickel chloride and cobalt chloride in the ratio of 1...

Embodiment 3

[0046] A kind of NiCo 2 S 4 / The preparation method of graphite felt composite electrode material, concrete process is as follows:

[0047] (1) Pre-oxidation treatment of graphite felt

[0048] The graphite felt was cut into a rectangle of 2 cm x 2 cm, ultrasonically cleaned with acetone, ethanol, and deionized water for 3 hours, and dried in vacuum at 60 °C for 24 h.

[0049] Prepare 40mL of aqua regia according to the volume ratio of concentrated hydrochloric acid and concentrated nitric acid 3:1, put the cleaned graphite felt into aqua regia, and oxidize at 80°C for 24h, and control the heating rate to 2°C / min. After natural cooling, the graphite felt was washed with deionized water until the pH was neutral, and dried at 60° C. to obtain a pretreated graphite felt.

[0050] (2) Loaded nickel-cobalt precursor

[0051] Configure 60ml mixed solution according to the volume ratio of deionized water and ethanol as 1:1, add nickel chloride and cobalt chloride in the ratio of ...

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Abstract

The invention discloses a preparation method and application of a NiCo2S4 / graphite felt composition electrode material. Water and ethyl alcohol serve as solvents, baking soda serves as an alkali source, ammonium fluoride serves as surfactant, cobalt chloride and nickel chloride serve as a cobalt source and a nickel source respectively, and a nickel-cobalt precursor is constructed on pre-oxidized graphite felt through hydrothermal reaction; then thioacetamide serves as a sulfur source, and the needle-shaped NiCo2S4 / graphite felt composition electrode material is prepared through the secondary hydrothermal method. The nickel-cobalt precursor can increase the sulfur loading amount and stabilize appearance of NiCo2S4, ammonium fluoride greatly increases the nucleation rate of NiCo2S4, and accordingly the specific capacitance of the composite material is increased and is as high as 1260-1265 F / g. The prepared NiCo2S4 / graphite felt composition electrode material is good in conductivity and high in specific capacitance, has the mechanical property of softness, and can be used as a supercapacitor electrode material.

Description

technical field [0001] The invention belongs to the field of nanomaterials and electrochemistry, in particular to a NiCo 2 S 4 Preparation method and application of graphite felt composite electrode material. Background technique [0002] Compared with batteries and electric double-layer capacitors, supercapacitors have the advantages of high power density, fast charge and discharge speed, and long cycle life, so they are irreplaceable and efficient energy storage devices. Supercapacitors are mainly composed of four parts: current collectors, electrodes, electrolytes, and separators. Among them, the structure and characteristics of electrode materials are the key factors that determine the performance of supercapacitors. So far, there have been many reports on metal oxides and metal hydroxides as electrode materials, such as Co 2 o 3 、NiCo 2 o 4 , Ni(OH) 2 、Co(OH) 2 However, the research on metal sulfides as electrode materials is still relatively rare. Metal sulfid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/32H01G11/86
CPCY02E60/13H01G11/30H01G11/32H01G11/86
Inventor 郑玉婴张祥
Owner FUZHOU UNIV
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