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Wire-shaped nickel cobalt oxide@nickel cobalt sulfide hetero-structure composite, and preparation method and purpose thereof

A technology of nickel-cobalt oxide and nickel-cobalt sulfide, applied in the field of nanomaterials, can solve the problems of low energy density and power density, difficult application requirements, small active area, etc., to achieve high energy density and power density, and production cost The effect of low and large specific capacitance

Inactive Publication Date: 2015-07-22
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in practical applications, it is found that these traditional electrode materials have more or less their own defects, such as: small active area, poor conductivity, low capacitance, short cycle time, low energy density and power density, due to The existence of these defects makes it difficult to meet the higher application requirements in reality

Method used

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  • Wire-shaped nickel cobalt oxide@nickel cobalt sulfide hetero-structure composite, and preparation method and purpose thereof
  • Wire-shaped nickel cobalt oxide@nickel cobalt sulfide hetero-structure composite, and preparation method and purpose thereof
  • Wire-shaped nickel cobalt oxide@nickel cobalt sulfide hetero-structure composite, and preparation method and purpose thereof

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Experimental program
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preparation example Construction

[0031] The preparation method comprises the following steps:

[0032] a. Clean the nickel foam with impurities on the surface: Put the nickel foam with impurities on the surface into ethanol, acetone, dilute hydrochloric acid, and double distilled water in sequence for ultrasonic cleaning, and the ultrasonic cleaning time is 10-20 minutes respectively.

[0033] b. Mix double-distilled water, nickel chloride hexahydrate, cobalt chloride hexahydrate, urea and ammonium fluoride evenly to obtain a mixed solution, add it to the reaction kettle, immerse the cleaned foamed nickel in the mixed solution, and put the reaction kettle Airtight, react at 100-150°C for 4-10h, cool to room temperature, wash, and dry at room temperature to obtain foamed nickel with nickel-cobalt oxide nanowires growing. In the mixed solution obtained in step b, chlorine hexahydrate The concentration of nickel chloride ≥ 0.008mol / L, the concentration of cobalt chloride hexahydrate ≥ 0.016mol / L, the concentrati...

Embodiment 1

[0036] A method for preparing a linear nickel-cobalt oxide nickel-cobalt sulfide heterostructure composite material, comprising the following steps:

[0037] a. Put the nickel sheet with impurities on the surface into ethanol, acetone, dilute hydrochloric acid, and twice distilled water for 15 minutes of ultrasonic cleaning;

[0038] b. Mix 25mL double-distilled water, 0.2mmol nickel chloride hexahydrate, 0.4mmol cobalt chloride hexahydrate, 1mmol urea and 0.4mmol ammonium fluoride, mix them evenly, add them to a 100mL reaction kettle, and immerse the treated foamed nickel into the mixture During the process, tighten the lid of the kettle, react at 120°C for 8 hours, take out the reaction kettle and let it cool down to room temperature naturally, rinse it with ethanol and double distilled water in turn, and dry it at room temperature, that is, nickel foam with nickel-cobalt oxide nanowire material grown.

[0039] c. Dissolve 0.4mmol sodium sulfide in 25mL double distilled wate...

Embodiment 2

[0045] A method for preparing a linear nickel-cobalt oxide nickel-cobalt sulfide heterostructure composite material, comprising the following steps:

[0046] a. Put the nickel sheet with impurities on the surface into ethanol, acetone, dilute hydrochloric acid, and twice distilled water for 15 minutes of ultrasonic cleaning;

[0047] b. Mix 25mL double-distilled water, 0.2mmol nickel chloride hexahydrate, 0.4mmol cobalt chloride hexahydrate, 2mmol urea and 0.4mmol ammonium fluoride, mix them evenly, add them to a 100mL reaction kettle, and immerse the treated foamed nickel into the mixture During the process, tighten the lid of the kettle, react at 150°C for 10 hours, take out the reaction kettle and cool it down to room temperature naturally, rinse it with ethanol and double-distilled water in turn, and dry it at room temperature, that is, nickel foam with nickel-cobalt oxide nanowire material grown.

[0048] c. Dissolve 0.25mmol sodium sulfide in 25mL double-distilled water,...

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Abstract

The invention relates to a wire-shaped nickel cobalt oxide@nickel cobalt sulfide hetero-structure composite, and a preparation method and purpose thereof. The wire-shaped nickel cobalt oxide@nickel cobalt sulfide hetero-structure composite has the advantages that the composite uses nickel cobalt oxide nanowires as a framework, and an anion exchange method is used to convert the nickel cobalt oxide nanowires into the nickel cobalt oxide@nickel cobalt sulfide nanowires which are large in surface area and good in conductivity and flexibility through sulfur ion etching; the preparation of the nanowires uses a hydrothermal method and an in-situ growth method, the nanowires which structurally vertically grow are neat in arrangement and has a regular three-dimensional hetero-structure; compared with the prior art, the composite prepared by the method is high in purity, good in dispersity, good crystal form, controllable, low in production cost and good in reproducibility; the prepared composite grows on foam nickel and can be directly used as the electrode material of super capacitors, and long circulation stability, large specific capacitance, high energy density and power density and high commercial value are achieved.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a preparation method and application of a linear nickel-cobalt oxide nickel-cobalt sulfide heterostructure composite material. Background technique [0002] With the rapid development of science and technology and the upgrading of electronic products, the research on supercapacitor electrode materials has aroused great interest of researchers. At present, the traditional supercapacitor electrode materials mainly include the following categories: carbon material electrode materials, metal oxide electrode materials, and conductive polymer electrode materials. However, in practical applications, it is found that these traditional electrode materials have more or less their own defects, such as: small active area, poor conductivity, low capacitance, short cycle time, low energy density and power density, due to The existence of these defects makes it difficult to meet the high...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/24H01G11/86
CPCY02E60/13H01G11/30H01G11/24H01G11/86
Inventor 张小俊马文勤南红红梁干
Owner ANHUI NORMAL UNIV
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