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Preparation method of NiCo2O4@Ni-Co LDH composite electrode for all-solid-state flexible supercapacitor

A technology for supercapacitors and composite electrodes, applied in the field of capacitors, can solve the problems of complex preparation, poor mechanical properties and stability of supercapacitor electrode materials, and insufficient chemical properties, and achieves simple preparation methods, good ion diffusion capacity, and good charge storage. effect of ability

Inactive Publication Date: 2021-02-19
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the problems existing in the above-mentioned prior art, the object of the present invention is to provide a NiCo2O4@Ni-Co LDH composite electrode for an all-solid flexible supercapacitor and a preparation method thereof, so as to solve the problem of poor mechanical properties and stability of supercapacitor electrode materials, and Complicated preparation, poor chemical properties, etc.

Method used

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  • Preparation method of NiCo2O4@Ni-Co LDH composite electrode for all-solid-state flexible supercapacitor
  • Preparation method of NiCo2O4@Ni-Co LDH composite electrode for all-solid-state flexible supercapacitor

Examples

Experimental program
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Effect test

Embodiment 1

[0021] (1) 2mmol NiCl2·6H2O, 4mmol CoCl2·6H2O, 10mmol urea and 40ml deionized water were mixed and stirred to obtain a solution, and 0.1g NH4F was added therein, and stirred evenly to obtain a uniform solution.

[0022] (2) Put the carbon cloth into the solution vertically, and then put it into a vacuum blast drying oven at 120°C for 6 hours. If the time is too short, the active substances that grow up are too few; if the time is too long, the active substances that grow up are too dense leading to reunion.

[0023] (3) After taking out the carbon cloth, wash it repeatedly with deionized water and absolute ethanol for more than three times, put it in a vacuum drying oven and dry it at 70°C for 12 hours, then place the dry carbon cloth in a quartz tube furnace Heating from room temperature to 350°C with a heating rate of 2°C min-1, followed by annealing for 2 hours to obtain NiCo2O4 material.

[0024] (4) Mix 3.6mmol Ni(NO3)2·6H2O, 0.9mmol Co(NO3)2·6H2O, 50ml deionized water a...

Embodiment 2

[0029] (1) 4mmol NiCl2·6H2O, 8mmol CoCl2·6H2O, 20mmol urea and 80ml deionized water were mixed and stirred to obtain a solution, and 0.2g NH4F was added therein, and stirred evenly to obtain a uniform solution.

[0030] (2) Put the carbon cloth into the solution vertically, and then put it into a vacuum blast drying oven at 120°C for 6 hours. If the time is too short, the active substances that grow up are too few; if the time is too long, the active substances that grow up are too dense leading to reunion.

[0031] (3) After taking out the carbon cloth, wash it repeatedly with deionized water and absolute ethanol for more than three times, put it in a vacuum drying oven and dry it at 70°C for 12 hours, then place the dry carbon cloth in a quartz tube furnace Heating from room temperature to 350°C with a heating rate of 2°C min-1, followed by annealing for 2 hours to obtain NiCo2O4 material.

[0032] (4) Mix 3.6mmol Ni(NO3)2·6H2O, 0.9mmol Co(NO3)2·6H2O, 50ml deionized water a...

Embodiment 3

[0037] (1) 2mmol NiCl2·6H2O, 4mmol CoCl2·6H2O, 10mmol urea and 40ml deionized water were mixed and stirred to obtain a solution, and 0.2g NH4F was added therein, and stirred evenly to obtain a uniform solution.

[0038] (2) Put the carbon cloth into the solution vertically, and then put it into a vacuum blast drying oven at 150°C for 5 hours. If the time is too short, the active substances that grow up are too few; if the time is too long, the active substances that grow up are too dense leading to reunion.

[0039] (3) After taking out the carbon cloth, wash it repeatedly with deionized water and absolute ethanol for more than three times, put it in a vacuum drying oven and dry it at 70°C for 12 hours, then place the dry carbon cloth in a quartz tube furnace Heating from room temperature to 350°C with a heating rate of 2°C min-1, followed by annealing for 2 hours to obtain NiCo2O4 material.

[0040](4) Mix 7.2mmol Ni(NO3)2·6H2O, 1.8mmol Co(NO3)2·6H2O, 100ml deionized water a...

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Abstract

The invention provides a preparation method of a NiCo2O4@Ni-Co LDH composite electrode for an all-solid-state flexible supercapacitor, which comprises the following steps: (1) mixing NiCl2. 6H2O, CoCl2. 6H2O, urea and deionized water according to the mass ratio of 1:2:5:20, and slowly adding NH4F; (2) putting the carbon cloth into the solution, carrying out heat preservation, and carrying out furnace cooling to room temperature; (3) taking out the carbon cloth, cleaning, and carrying out annealing treatment; (4) uniformly mixing Ni(NO3)2.6H2O, Co(NO3)2.6H2O and NH4F according to the mass ratioof 4:1:2.8; and (5) obtaining a NiCo2O4@Ni-Co LDH / CFC electrode material by using an electro-deposition method, taking out the NiCo2O4@Ni-Co LDH / CFC electrode material, sequentially cleaning the NiCo2O4@Ni-Co LDH / CFC electrode material by using deionized water and absolute ethyl alcohol, and drying the NiCo2O4@Ni-Co LDH / CFC electrode material. The all-solid-state flexible supercapacitor not onlyhas good charge storage capacity and ion diffusion capacity, but also has good cycling stability, the preparation method is simple, and the product has good electrochemical performance.

Description

technical field [0001] The invention belongs to the technical field of capacitors, and in particular relates to an all-solid-state flexible supercapacitor with NiCo 2 o 4 @Ni-Co LDH composite electrode and its preparation method. Background technique [0002] Energy is the material basis for human survival. In modern society, with the rapid development of economy and society, human's demand for energy continues to increase. Due to the extensive use of fossil fuels and the extensive development of human beings, fossil energy has begun to gradually dry up, and the extensive use of fossil fuels has also caused serious pollution to the environment, threatening the sustainable development of human beings and social economy. [0003] Supercapacitors have high specific capacity and power density, but the development of supercapacitors faces a series of problems. The current research on supercapacitors mainly revolves around the development of electrode materials, the selection ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/30H01G11/24
CPCH01G11/24H01G11/30H01G11/86Y02E60/13
Inventor 陈正旭苗屹冬李应利胡泽源隋艳伟戚继球委福祥任耀剑肖彬孙智孟庆坤
Owner CHINA UNIV OF MINING & TECH
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