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One-step preparation of spherical crossed nickel hydroxide nanosheets based on porous nickel framework

A technology of porous nickel and nanosheets, which is applied in the field of preparation of β-Ni2 nanosheets, can solve the problems of large pore size, long production cycle, complicated procedures, etc., and achieve the effects of simplified production process, high sphericity, and simple and fast operation.

Active Publication Date: 2019-10-22
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, long production cycle, complex process, and large pore size (100-200 microns) are the significant disadvantages of electrodeposition.

Method used

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  • One-step preparation of spherical crossed nickel hydroxide nanosheets based on porous nickel framework
  • One-step preparation of spherical crossed nickel hydroxide nanosheets based on porous nickel framework
  • One-step preparation of spherical crossed nickel hydroxide nanosheets based on porous nickel framework

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 0.1g of sodium chloride, fully grind for 10min, mix evenly with 0.3g of reduced nickel powder with a particle size of 5 microns, place it in a clean cylindrical mold with an inner diameter of 2cm, place it in the center of a hydraulic press after closing the mold, and pressurize to 20MPa, and take it out after keeping it for 5min. Load the pressed disc-shaped blank with a quartz boat and place it in a clean quartz tube. After the air is exhausted, adjust the flow rate of hydrogen to 100 sccm and argon to 200 sccm, raise the temperature to 700 °C at a rate of 10 °C / min, and keep it for 8 hours. Bring to room temperature. The calcined dense flakes were placed in deionized water, kept in an oven at 60°C for 6 hours, and taken out. After drying, see Figure 1-4 .

Embodiment 2

[0029] Weigh 0.2g of sodium chloride, fully grind for 10min, mix evenly with 0.2g of reduced nickel powder with a particle size of 5 microns, place it in a clean cylindrical mold with an inner diameter of 2cm, place it in the center of a hydraulic press after closing the mold, and pressurize to 20MPa, and take it out after keeping it for 5min. Load the pressed disc-shaped blank with a quartz boat and place it in a clean quartz tube. After the air is exhausted, adjust the flow rate of hydrogen to 100 sccm and argon to 200 sccm, raise the temperature to 700 °C at a rate of 10 °C / min, and keep it for 8 hours. Bring to room temperature. Place the calcined dense flakes in deionized water, keep them in an oven at 60°C for 6 hours, take them out and dry them.

Embodiment 3

[0031] Weigh 0.2g of sodium chloride, fully grind for 10min, mix evenly with 0.2g of reduced nickel powder with a particle size of 2 microns, place it in a clean cylindrical mold with an inner diameter of 2cm, place it in the center of a hydraulic press after closing the mold, and pressurize to 20MPa, and take it out after keeping it for 5min. Load the pressed disc-shaped blank with a quartz boat and place it in a clean quartz tube. After the air is exhausted, adjust the flow rate of hydrogen to 100 sccm and argon to 200 sccm, raise the temperature to 700 °C at a rate of 10 °C / min, and keep it for 8 hours. Bring to room temperature. Place the calcined dense flakes in deionized water, keep them in an oven at 60°C for 6 hours, take them out and dry them.

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Abstract

The invention discloses a method for preparing spherical cross-nickel hydroxide nano sheets in one step based on a porous nickel skeleton. The method comprises the steps that nickel powder and solublesalt are ground, uniformly mixed, pressed into semifinished products, placed in an inert atmosphere for sintering, and placed in the water for heat reservation for a period of time to obtain the spherical cross beta-Ni(OH)2 nano sheets taking a porous nickel template as a substrate. Compared with traditional nickel foam (pore diameter 100-200 microns), the pore diameter of the novel porous nickeltemplate is only 1-2 microns, the larger specific area of the novel porous nickel template facilitates large amount of loading of active substances, and the novel porous nickel template has larger application prospect in the fields of sensing and energy, particularly when the novel porous nickel template is used as a positive electrode material of a nickel-metal hydride battery. The method has the advantages of being simple in operation, green and environmentally-friendly, mild in reaction conditions and suitable for massive production. The spherical cross beta-Ni(OH)2 nano sheets are uniformly distributed on the skeleton of a porous nickel template, grain size is distributed uniformly, surface microstructure is diversified, the specific area is large and improvement of electrochemical performance is facilitated.

Description

technical field [0001] The present invention relates to a kind of β-Ni(OH) 2 A method for preparing nanosheets, especially a method for preparing spherical cross-β-Ni(OH) in one step based on a porous nickel framework 2 nanosheet method. Background technique [0002] Nickel foam is the key raw material of nickel-based batteries, and is also used as a variety of industrial electrochemical reaction electrodes and fuel cell electrodes. With the continuous growth of the global energy field, nickel foam ushered in a period of rapid development. The preparation process of foamed nickel mainly includes foaming method, vapor deposition method, sputtering deposition method and electrodeposition method. Among them, nickel foam prepared by electrodeposition has the advantages of light matrix, high porosity, and good toughness, and is favored in commercial and research fields. Its main processes are: cleaning organic foam, conductive treatment, electroplating nickel deposition and r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G53/04B82Y40/00
Inventor 黄靖云冒伟伟孙鹏程叶志镇
Owner ZHEJIANG UNIV
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