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Supercapacitor electrode material and preparation method thereof

A technology of supercapacitors and electrode materials, which is used in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors.

Active Publication Date: 2018-03-09
合肥九州龙腾科技成果转化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] So far, NiCo has not been prepared by potential deposition 2 o 4 -Ni(OH) 2 / Report on nickel foam (NF) supercapacitor electrode material, the preparation process is simple, the process is green and environmentally friendly, and the composite electrode material has excellent capacitance properties

Method used

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  • Supercapacitor electrode material and preparation method thereof
  • Supercapacitor electrode material and preparation method thereof
  • Supercapacitor electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1)NiCo 2 o 4 Preparation of / NF samples:

[0029] Weigh 1mmol of Ni(NO 3 ) 2 ·6H 2 O, 2mmol of Co(NO 3 ) 2 ·6H 2 0 and 5 mmol of urea in a beaker, add deionized water to it, magnetically stir until completely dissolved, then add the resulting transparent pink solution to a polytetrafluoroethylene reactor, add pretreated foamed nickel to carry out hydrothermal reaction , 130°C, 5h; after naturally cooling to room temperature, take out the nickel foam, wash it with water and alcohol several times, and dry it to get NiCo 2 o 4 / NF precursor samples. Waiting for NiCo 2 o 4 After the / NF precursor sample was dried, the sample was transferred to a temperature-programmed tube furnace for calcination at 350 °C for 2 h. After cooling down to room temperature naturally, take it out and set aside. Calcined NiCo 2 o 4 The heating rate of the / NF precursor sample was 4 °C / min, and the calcination time was 2 h.

[0030] (2)NiCo 2 o 4 -Ni(OH) 2 / NF composite prepar...

Embodiment 2

[0033] (1)NiCo 2 o 4 Preparation of / NF samples:

[0034] Weigh 2mmol of Ni(NO 3 ) 2 ·6H 2 O, 4mmol of Co(NO 3 ) 2 ·6H 2 O and 10mmol of urea in a beaker, add deionized water to it, magnetically stir until completely dissolved, then add the resulting transparent pink solution to a polytetrafluoroethylene reactor, add pretreated nickel foam for hydrothermal reaction , 130°C, 5h; after naturally cooling to room temperature, take out the nickel foam, wash it with water and alcohol several times, and dry it to get NiCo 2 o 4 / NF precursor samples. Waiting for NiCo 2 o 4 After the / NF precursor sample was dried, the sample was transferred to a temperature-programmed tube furnace for calcination. After cooling down to room temperature naturally, take it out and set aside. Calcined NiCo 2 o 4 The heating rate of the / NF precursor sample was 4 °C / min, the calcination temperature was 350 °C, and the time was 2 h.

[0035] (2)NiCo 2 o 4 -Ni(OH) 2 Preparation of / NF co...

Embodiment 3

[0038] (1)NiCo 2 o 4 Preparation of / NF samples:

[0039] Weigh 4mmol of Ni(NO 3 ) 2 ·6H 2 O, 8mmol of Co(NO 3 ) 2 ·6H 2 0 and 20 mmol of urea in a beaker, add deionized water therein, and magnetically stir until completely dissolved, then add the gained transparent pink solution into a polytetrafluoroethylene reactor, add the prepared nickel foam and carry out hydrothermal reaction for 130 ℃, 5h; after naturally cooling to room temperature, take out the nickel foam, wash it with water and alcohol several times, and dry it to get NiCo 2 o 4 / NF precursor samples. Waiting for NiCo 2 o 4 After the / NF precursor sample was dried, the sample was transferred to a temperature-programmed tube furnace for calcination. After cooling down to room temperature naturally, take it out and set aside. Calcined NiCo 2 o 4 The heating rate of the / NF precursor sample was 4 °C / min, the calcination temperature was 350 °C, and the time was 2 h.

[0040] (2)NiCo 2 o 4 -Ni(OH) 2 P...

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Abstract

The invention belongs to the technical field of preparation of supercapacitor materials, and relates to a preparation method of a nickel cobaltate / nickel hydroxide / foamed nickel supercapacitor electrode material. According to the method, the nickel cobaltate is enabled to grow on the foamed nickel in situ, and then the nickel hydroxide is electrochemically deposited on a nickel cobaltate / foamed nickel sample. Meanwhile, the high specific surface area of the sample is maintained. During the rapid charging and discharging process, the nickel hydroxide / nickel cobaltate / foamed nickel composite electrode material is maintained to be high in cycling performance and high in capacitance performance. The nickel hydroxide / nickel cobaltate / foamed nickel electrode material can be directly subjected toelectrochemical test, and is different from the traditional sample dropping test.

Description

technical field [0001] The invention belongs to the technical field of preparation of supercapacitor materials, and relates to a preparation method of a nickel cobaltate / nickel hydroxide / nickel foam supercapacitor electrode material, in particular a composite with a simple preparation process, good capacitance performance and excellent stability The method of preparation of the material. Background technique [0002] Supercapacitor is a new type of energy storage device, which has the advantages of high power density, short charging time, long cycle life, and environmental protection. It can be applied to energy storage devices, power supply systems and many electronic devices. However, single nanomaterials have disadvantages such as small active area, poor conductivity, low capacitance, short cycle time, low energy density and power density, which limit their practical application in capacitors. Among the electrode materials used in supercapacitors, transition metal hydrox...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/24H01G11/30H01G11/46
CPCH01G11/24H01G11/30H01G11/46H01G11/86Y02E60/13
Inventor 陈敏夏萍姜德立全威肖鹏李娣
Owner 合肥九州龙腾科技成果转化有限公司
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