Preparation method and application of cobalt diselenide/carbon-based flexible electrode material with interface enhancement structure

A technology of cobalt diselenide and interface enhancement, which is applied in the direction of fuel cell half-cells and secondary battery-type half-cells, battery electrodes, structural parts, etc., can solve the problems of electrochemical performance degradation and easy damage, and achieve The effect of increasing the contact area, enhancing stability, and improving stability

Inactive Publication Date: 2020-12-11
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problem that the traditional three-dimensional electrode is easily damaged under the action of external force, leading to the deterioration of electrochemical performance, the present invention provides a preparation method of cobalt diselenide / carbon-based flexible electrode material with interface enhanced structure

Method used

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  • Preparation method and application of cobalt diselenide/carbon-based flexible electrode material with interface enhancement structure
  • Preparation method and application of cobalt diselenide/carbon-based flexible electrode material with interface enhancement structure
  • Preparation method and application of cobalt diselenide/carbon-based flexible electrode material with interface enhancement structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Hydrophilicize the carbon cloth: cut the carbon cloth into 3 x 3 cm 2 size, add concentrated nitric acid, and treat at 80°C for 4 hours;

[0036] (2) Weigh 1.3136 g of 2-methylimidazole dissolved in 40 mL of deionized water, denoted as A; weigh 0.582 g of Co(NO 3 ) 2 ·6H 2 O was dissolved in 40 mL deionized water, which was denoted as B; Pour A into B and stir evenly, then add hydrophilic carbon cloth, and let it stand for 4 hours to obtain the Co-MOF@CC composite material, the SEM image of which is as follows figure 1 (a) Shown: the obtained 2D Co-MOF presents a 2D triangular sheet with a thickness of about 200 nm;

[0037] (3) Put Co-MOF@CC in a tube furnace, N 2 Under atmosphere, heat up to 500°C at 5°C / min, pass through ethanol, H 2 , calcined for 20 min, Co / N-CNT@CC composite material;

[0038] (4) Put Co / N-CNT@CC in a tube furnace, add 0.6g selenium powder, N 2 Under the atmosphere, the temperature is raised to 450°C at 10°C / min, and selenized for 2h to...

Embodiment 2

[0042] (1) Hydrophilicize the carbon cloth: cut the carbon cloth into 3 x 3 cm 2 size, add concentrated nitric acid, and treat at 75°C for 5 hours;

[0043] (2) Weigh 1.3136 g of 2-methylimidazole dissolved in 40 mL of deionized water, denoted as A; weigh 0.582 g of Co(NO 3 ) 2 ·6H 2O, 0.075g Zn(NO 3 ) 2 ·6H 2 O was dissolved in 40 mL of deionized water, denoted as B; A was poured into B and stirred evenly, then hydrophilized carbon cloth was added, and left to stand for 4 h to obtain a Co(Zn)-MOF@CC composite material, the SEM image of which was shown image 3 Shown: The obtained two-dimensional Co(Zn)-MOF presents two-dimensional triangular flakes;

[0044] (3) Put Co(Zn)-MOF@CC in a tube furnace, N 2 Under the atmosphere, heat up to 300°C at 5°C / min, pass through ethanol, H 2 , calcined for 20min, Co(Zn) / N-CNT@CC composite material;

[0045] (4) Put Co(Zn) / N-CNT@CC in a tube furnace, add 0.45 g of selenium powder, N 2 Under the atmosphere, the temperature was rais...

Embodiment 3

[0049] (1) Hydrophilicize the carbon cloth: cut the carbon cloth into 3 x 3 cm 2 size, add concentrated nitric acid, and treat at 85°C for 4 hours;

[0050] (2) Weigh 1.3136 g of 2-methylimidazole dissolved in 40 mL of deionized water, denoted as A; weigh 0.582 g of Co(NO 3 ) 2 ·6H 2 O, 0.073g Ni(NO 3 ) 2 ·6H 2 O was dissolved in 40 mL of deionized water, denoted as B; A was poured into B and stirred evenly, then hydrophilized carbon cloth was added, and left to stand for 4 h to obtain the Co(Ni)-MOF@CC composite material, the SEM image of which was shown Figure 4 Shown: The obtained two-dimensional Co(Ni)-MOF presents a two-dimensional triangular sheet;

[0051] (3) Put Co(Ni)-MOF@CC in a tube furnace, N 2 Under the atmosphere, heat up to 800°C at 5°C / min, pass through ethanol, H 2 , calcined for 20min, Co(Ni) / N-CNT@CC composite material;

[0052] (4) Put Co(Ni) / N-CNT@CC in a tube furnace, add 0.75 g of selenium powder, N 2 Under the atmosphere, the temperature was...

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Abstract

The invention relates to the technical field of new energy materials, in particular to a preparation method and application of a cobalt diselenide / carbon-based flexible electrode material with an interface enhancement structure. The preparation method comprises the following steps: (1) carrying out hydrophilization treatment on carbon cloth; (2) preparing a metal salt solution containing Co<2+>, adding a 2-methylimidazole solution, carrying out uniform mixing to obtain a mixed solution, adding the hydrophilized carbon cloth into the mixed solution, and conducting standing for reaction; (3) growing a carbon nanotube by adopting a CVD method; (4) carrying out selenylation treatment to obtain a CoSe2 / N-CNT@CC composite material; and (5) compounding theCoSe2 / N-CNT@CC composite materialwith a gel electrolyte to obtain the cobalt diselenide / carbon-based flexible electrode material with the interface enhancement structure. The preparation method disclosed by the invention is simple to operate, mild in condition, easy to control, free of special requirements on equipment and beneficial to industrial production; and the prepared cobalt diselenide / carbon-based flexible electrode material with the interface enhancement structure has a high contact area and high stability, and has wide application prospects in the field of flexible devices.

Description

technical field [0001] The invention relates to the technical field of new energy materials, in particular to a preparation method and application of a cobalt diselenide / carbon-based flexible electrode material with an interface enhanced structure. Background technique [0002] With the rapid development of the global economy and society, human demand for energy is growing rapidly. The environmental degradation caused by the massive consumption of traditional fossil energy forces us to constantly seek new green energy production technologies. Due to the advantages of high specific energy, stable discharge voltage, low cost, safety and environmental protection, zinc-air batteries have attracted widespread attention and have great application potential in the field of new energy. [0003] Compared with traditional planar coating or spraying electrodes, three-dimensional electrodes have the advantages of large specific surface area, fast electron and ion transmission rate, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/86H01M12/08
CPCH01M4/8657H01M4/88H01M12/08
Inventor 曹澥宏郑冬刘文贤施文慧张琳
Owner ZHEJIANG UNIV OF TECH
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