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Beta-Ni (OH) 2 nanosheet array electrode material growing on large-size foamed nickel in situ and application of beta-Ni (OH) 2 nanosheet array electrode material

A nanosheet array, in-situ growth technology, used in hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, electrolytic capacitors, etc. degree of agglomeration, large size, large capacity and the effect of

Active Publication Date: 2022-02-25
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Another effective and feasible method is to synthesize Ni(OH) on a good conductive substrate 2 Electrode material, nickel foam (NF) has a three-dimensional network structure with high strength, good electrical conductivity and thermal conductivity, therefore, NF is often used as a conductive substrate to optimize the Ni(OH) 2 Conductivity of materials, Ni(OH) synthesized on NF 2 Although electrode materials show good electrochemical activity and cycle stability, Ni(OH) 2 The disadvantages of small material size, difficult expansion and low loading capacity still severely limit its practical application.

Method used

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  • Beta-Ni (OH) 2 nanosheet array electrode material growing on large-size foamed nickel in situ and application of beta-Ni (OH) 2 nanosheet array electrode material
  • Beta-Ni (OH) 2 nanosheet array electrode material growing on large-size foamed nickel in situ and application of beta-Ni (OH) 2 nanosheet array electrode material
  • Beta-Ni (OH) 2 nanosheet array electrode material growing on large-size foamed nickel in situ and application of beta-Ni (OH) 2 nanosheet array electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] 1. Prepare large-sized nickel foam (length 100cm×width 30cm×thickness 0.16cm) for use, such as figure 1 Shown, the quality of this moment nickel foam is about 33.4g;

[0058] 2. 346g (206mL) mass fraction of 85% H 3 PO 4 The solution was added dropwise to 2794mL deionized water, stirred magnetically for 10 minutes, and prepared into 1MH 3 PO 4 solution;

[0059] 3. Curl the nickel foam and immerse it in 1M H 3 PO 4 solution, etched at room temperature (about 22°C) for 15 hours, took out the etched nickel foam and dried it naturally at room temperature to obtain Ni foam formed on the surface. 3 (PO 4 ) 2 Precursors of nickel foam, such as figure 2 shown;

[0060] 4. At room temperature, generate Ni on the surface 3 (PO 4 ) 2 The nickel foam of the precursor is crimped and soaked in 4M KOH solution for 20 hours, and the soaked nickel foam is taken out and dried naturally at room temperature to obtain β-Ni(OH) grown in situ on the large-sized nickel foam. 2 ...

Embodiment 2

[0074] 1. Prepare large-sized nickel foam (length 100cm×width 30cm×thickness 0.16cm) for use. At this time, the mass of foam nickel is about 33.4g;

[0075] 2. 34.5g (20.7mL) of 85% H 3 PO 4 The solution was added dropwise to 2979.3mL deionized water, stirred magnetically for 10 minutes, and prepared into 0.1M H 3 PO 4 solution;

[0076] 3. Curl the nickel foam and immerse it in 0.1M H 3 In PO4 solution, at room temperature (about 2 ℃, etch 15h, take out the foamed nickel after etching and dry naturally at room temperature, obtain the surface and generate Ni 3 (PO4) 2 Precursor nickel foam;

[0077] 4. At room temperature, generate Ni on the surface 3 (PO4) 2 The nickel foam of the precursor is crimped and soaked in 4M KOH solution for 20 hours, and the soaked nickel foam is taken out and dried naturally at room temperature to obtain β-Ni(OH) grown in situ on the foam nickel. 2 Nanosheet array electrode material, after acid etching and alkali soaking, the loading capa...

Embodiment 3

[0084] 1. Prepare large-sized nickel foam (length 100cm×width 30cm×thickness 0.16cm) for use, and the mass of foam nickel is about 33.4g for use;

[0085] 2. 346g (206mL) mass fraction of 85% H 3 PO 4 The solution was added dropwise to 2794 mL of deionized water, stirred magnetically for 10 minutes, and prepared into 1M H 3 PO 4 solution;

[0086] 3. Curl the nickel foam and immerse it in 1M H 3 PO 4 solution, etched at room temperature (about 22°C) for 15 hours, took out the etched nickel foam and dried it naturally at room temperature to obtain Ni foam formed on the surface. 3 (PO 4 ) 2 Precursor nickel foam;

[0087] 4. At room temperature, generate Ni on the surface 3 (PO 4 ) 2 The nickel foam of the precursor is crimped and soaked in 4M KOH solution for 5 hours, and the soaked nickel foam is taken out and dried naturally at room temperature to obtain β-Ni(OH) grown in situ on the large-sized nickel foam. 2 Nanosheet array electrode material, after acid etching...

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Abstract

The invention discloses a beta-Ni (OH) 2 nanosheet array electrode material growing on large-size foamed nickel in situ and application of the beta-Ni (OH) 2 nanosheet array electrode material. The preparation method of the electrode material comprises the following steps: 1, preparing a phosphoric acid solution; 2, immersing the large-size foamed nickel into a phosphoric acid solution, etching at room temperature, taking out the foamed nickel after etching is completed, and drying to obtain foamed nickel with a Ni3 (PO4) 2 precursor generated on the surface; and 3, at room temperature, soaking the foamed nickel with the Ni3 (PO4) 2 precursor generated on the surface in a KOH solution, after soaking is completed, taking out the foamed nickel, and drying to obtain the beta-Ni (OH) 2 nanosheet array electrode material growing on the large-size foamed nickel in situ. The preparation method of the electrode material is simple and low in energy consumption, and the prepared beta-Ni (OH) 2 electrode material has excellent electrochemical performance on the basis of a large size, and is an electrode material with large size, high loading capacity, large capacity and large-size specific capacitance, so that the electrode material can be used for preparing a large-size high-capacity pseudo capacitor electrode, and used for electrochemical energy storage.

Description

technical field [0001] The invention belongs to the technical field of electrochemical energy storage materials, in particular to β-Ni(OH) grown in situ on large-sized nickel foam 2 Nanosheet array electrode materials and their applications. Background technique [0002] With the discovery of fossil fuels, although it provides convenience for our daily life, environmental pollution is aggravated due to the use of fossil fuels. Therefore, the development of clean and renewable energy has received extensive attention. In order to make better use of energy, it is of great significance to develop a device that efficiently stores and converts energy. Therefore, high-efficiency energy storage has become one of the key issues in current research, among which supercapacitors are due to their high power density, long cycle life, and environmental friendliness. , security and other advantages have attracted the attention of many researchers. However, at present, the shortcomings of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/22H01G11/24H01G11/86
CPCH01G11/30H01G11/22H01G11/24H01G11/86Y02E60/13
Inventor 唐一文刘高福郑诗妍王铭圭余燕青
Owner HUAZHONG NORMAL UNIV
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