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rosette ni(oh) 2 /rgo composite electrode material and its preparation method and application

A composite electrode and composite material technology, applied in the field of composite materials, can solve the problems of difficulty in effectively improving material stability and uneven contact, and achieve the possible effects of improving stability, increasing actual specific capacitance, and reducing structural changes

Active Publication Date: 2020-03-17
陕西云舟智创科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of these flower-shaped nickel hydroxides are spherical nickel hydroxides with rough surfaces or a large number of pores; in addition, graphene is mostly the substrate in most literatures, and Ni(OH) 2 The contact is not uniform enough, and the stability of the material is difficult to effectively improve

Method used

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  • rosette ni(oh) <sub>2</sub> /rgo composite electrode material and its preparation method and application
  • rosette ni(oh) <sub>2</sub> /rgo composite electrode material and its preparation method and application
  • rosette ni(oh) <sub>2</sub> /rgo composite electrode material and its preparation method and application

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preparation example Construction

[0029] The present invention relates to rosette Ni(OH) 2 The preparation method of / rGO composite electrode material comprises the following steps:

[0030] Step 1: Rosette Ni(OH) 2 Preparation of / rGO composites:

[0031] Ultrasonic disperse 0.01-0.2g of graphene oxide into 100mL of deionized water to obtain graphene oxide mother liquor; take 30-60mL of graphene oxide mother liquor and heat it in a water bath, add 1-5ml of glycerin, and stir vigorously until it is fully mixed; then, 0.1 -0.6g of nickel salt is poured in, stirred until the nickel salt is completely dissolved to form a dark green solution; then, the resulting solution is added to a hydrothermal kettle for hydrothermal reaction, and the product is centrifugally washed and dried to obtain a rose-like Ni(OH) 2 / rGO composites;

[0032] Step 2: Rosette Ni(OH) 2 Preparation of / rGO composite electrode material:

[0033] Acetylene black, polyvinylidene fluoride and rosette Ni(OH) 2 The / rGO composite material i...

Embodiment 1

[0041] Step 1: Rosette Ni(OH) 2 Preparation of / rGO composites

[0042]Ultrasonic disperse 0.05g of graphene oxide into 100mL of deionized water to obtain a graphene oxide mother liquor; take 40mL of the above mother liquor and heat it in a water bath, add 1ml of glycerin, and stir vigorously until it is fully mixed. Subsequently, 0.3 g of nickel salt was poured into the dispersion, and stirred until all the nickel salt was dissolved to form a dark green solution. Next, add the solution obtained above into an 80mL hydrothermal kettle with a filling ratio of 50%, and keep it warm at 180°C for 5h. After the reaction is completed, the product is centrifugally washed and dried to obtain a rose-shaped Ni(OH) 2 / rGO composites.

[0043] Step 2: Preparation of composite electrode material

[0044] Mix acetylene black, polyvinylidene fluoride (PVDF) and the resulting composite material at a mass ratio of 1:1:8, add N-methylpyrrolidone (NMP) dropwise, and then apply it on a 1cm×2cm ...

Embodiment 2

[0046] Step 1: Rosette Ni(OH) 2 Preparation of / rGO composites

[0047] Ultrasonic disperse 0.05 g of graphene oxide into 100 mL of deionized water to obtain a graphene oxide mother liquor; take 46 mL of the above mother liquor and heat in a water bath, add 2 ml of glycerin, and stir vigorously until it is fully mixed. Subsequently, 0.416 g of nickel acetate was poured into the dispersion, and stirred until the nickel salt was completely dissolved to form a dark green solution. Next, add the solution obtained above into an 80mL hydrothermal kettle with a filling ratio of 60%, and keep it warm at 200°C for 3.5h. After the reaction is completed, the product is centrifugally washed and dried to obtain a rose-shaped Ni(OH) 2 / rGO composites.

[0048] Step 2: Preparation of composite electrode material

[0049] Mix acetylene black, polyvinylidene fluoride (PVDF) and the resulting composite material at a mass ratio of 1:1:8, add N-methylpyrrolidone (NMP) dropwise, and then apply ...

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Abstract

The invention relates to a rosette Ni(OH)2 / rGO composite electrode material and a preparation method and application thereof. The preparation method comprises the steps that oxidized graphene is dispersed into deionized water ultrasonically, and thus oxidized graphene mother liquor is obtained; the oxidized graphene mother liquor is taken to be heated in water bath, glycerinum is added, and intense stirring is conducted until the glycerinum and the oxidized graphene mother liquor are mixed fully; nickel salt is poured, stirring is conducted until the nickel salt is dissolved completely, and adark green solution is formed; the obtained solution is added into a hydrothermal reactor to be subjected to a hydrothermal reaction, after the reaction is completed, products are centrifugally washedand dried, and thus a rosette Ni(OH)2 / rGO composite material is obtained; and acetylene black, polyvinylidene fluoride and the rosette Ni(OH)2 / rGO composite material are mixed evenly, N-methyl pyrrolidone is added dropwise, then a mixture is smeared on one end of 1 cm*2 cm of nickel foam, drying and pressure maintaining are conducted, and thus the composite electrode material is obtained. The rosette Ni(OH)2 / rGO composite electrode material and the preparation method and application thereof have the advantages that raw materials are easy to obtain, environmental pollution is small, and operation is easy; and the obtained composite material has the rosette shape and can be used for an electrode material of a supercapacitor.

Description

technical field [0001] The invention belongs to the technical field of composite materials, in particular to a rose-shaped Ni(OH) 2 / rGO composite electrode material and its preparation method and application. Background technique [0002] Nickel hydroxide was originally widely used as an anode material in the field of alkaline batteries. Later, researchers found that it can also be used as an electrode material for supercapacitors. It has the advantages of high theoretical specific capacitance and abundant raw materials, which are specifically manifested in Faraday pseudocapacitance properties. . Graphene is a two-dimensional carbon material with excellent performance, which has high electron mobility (>15000cm 2 / Vs) and low resistivity (about 10 -8 Ω / m), which can show the electric double layer capacitance performance of supercapacitors. Due to the special properties of graphene, researchers combined the two through various methods to improve the shortcomings of po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/86
CPCH01G11/24H01G11/30H01G11/36H01G11/86Y02E60/13
Inventor 刘俊莉户瑞婧邵建真刘辉
Owner 陕西云舟智创科技有限公司
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