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Nitrogen and sulfur co-doped carbon fiber grafted polythiophene/MnS composite material and preparation method of electrode thereof

A technology of nitrogen-sulfur co-doping and composite materials, which is applied in the field of composite materials and electrochemistry, and can solve the problems of large shrinkage and expansion of conductive polymers, poor cycle stability, etc.

Active Publication Date: 2021-09-07
晋江瑞碧科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conductive polymer electrodes are prone to large shrinkage and expansion, resulting in poor cycle stability.
For transition metal compounds, although there are some disadvantages (such as poor conductivity), they can provide higher energy density than traditional carbon materials and better electrochemical stability than polymer materials.

Method used

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  • Nitrogen and sulfur co-doped carbon fiber grafted polythiophene/MnS composite material and preparation method of electrode thereof
  • Nitrogen and sulfur co-doped carbon fiber grafted polythiophene/MnS composite material and preparation method of electrode thereof

Examples

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Effect test

Embodiment 1

[0043] This embodiment relates to a preparation method of a nitrogen-sulfur co-doped carbon fiber grafted polythiophene / MnS composite electrode, such as figure 1 As shown, it specifically includes the following steps:

[0044] 1) Preparation of carbon fiber

[0045] Dissolve 2.8g of cellulose acetate (CA) in a mixed solvent of 30g of N,N-dimethylformamide and 20g of tetrahydrofuran, and stir magnetically at 50°C for 5h to form a solution. 0.8 g of tetraethyl orthosilicate was added dropwise into the solution, and the stirring was continued for 2 h to obtain a precursor quenching solution. After quenching the precursor quenching solution at -10°C for 100 minutes, take it out and soak it in distilled water to remove the mixed solvent, and change the distilled water once every 8 hours, and change the distilled water 3 times. After washing and drying, CA / SiO 2 Composite fibers. CA / SiO 2 The composite fiber was soaked in 0.1mol / L NaOH ethanol solution for 24h to convert CA int...

Embodiment 2

[0054] This embodiment relates to a preparation method of a nitrogen-sulfur co-doped carbon fiber grafted polythiophene / MnS composite electrode, which specifically includes the following steps:

[0055] 1) Preparation of carbon fiber

[0056] Dissolve 3.5g of cellulose acetate (CA) in a mixed solvent of 40g of N,N-dimethylformamide and 25g of tetrahydrofuran, and stir magnetically at 50°C for 5h to form a solution. 1.2 g of tetraethyl orthosilicate was added dropwise into the solution, and the stirring was continued for 2 h to obtain a precursor quenching solution. After quenching the precursor quenching solution at -25°C for 80 minutes, take it out and soak it in distilled water to remove the mixed solvent, change the distilled water once every 8 hours, and change the distilled water 3 times. After washing and drying, CA / SiO 2 Composite fibers. CA / SiO 2 The composite fiber was soaked in 0.1mol / L NaOH ethanol solution for 24h to convert CA into cellulose, washed with disti...

Embodiment 3

[0065] This embodiment relates to a preparation method of a nitrogen-sulfur co-doped carbon fiber grafted polythiophene / MnS composite electrode, which specifically includes the following steps:

[0066] 1) Preparation of carbon fiber

[0067] Dissolve 4g of cellulose acetate (CA) in a mixed solvent of 60g of N,N-dimethylformamide and 20g of tetrahydrofuran, and stir magnetically at 50°C for 5h to form a solution. Add 1 g of tetraethyl orthosilicate dropwise into the solution, and continue stirring for 2 h to obtain a precursor quenching solution. After quenching the precursor quenching solution at -15°C for 110 minutes, take it out and soak it in distilled water to remove the mixed solvent, and change the distilled water once every 8 hours, and change the distilled water 3 times. After washing and drying, CA / SiO 2 Composite fibers. CA / SiO 2 The composite fiber was soaked in 0.1mol / L NaOH ethanol solution for 24h to convert CA into cellulose, washed with distilled water and...

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Abstract

The invention provides a preparation method of a nitrogen and sulfur co-doped carbon fiber grafted polythiophene / MnS composite material and an electrode thereof. The wettability between the electrolyte and the electrode is improved by utilizing the high porosity and the large specific surface area of the carbon fiber skeleton; the polypyrrole is grafted onto the carbon fiber and is compounded with the manganese sulfide, so that the defect of low specific capacitance of a single carbon-based material is overcome, and the specific capacitance of the electrode material is greatly improved. As an electrode material of a supercapacitor, the nitrogen-sulfur co-doped carbon fiber grafted polythiophene / MnS composite material has the characteristics of stable preparation process, low cost, no pollution and the like, and has a good commercial prospect.

Description

technical field [0001] The invention relates to a nitrogen-sulfur co-doped carbon fiber grafted polythiophene / MnS composite material and a method for preparing an electrode thereof, belonging to the fields of composite materials and electrochemistry. Background technique [0002] With the rapid development of human society and the rapid depletion of non-renewable resources such as coal and oil, energy shortage has become an urgent problem for human beings to solve. The development of renewable resources has become a research hotspot for scientists. The storage of renewable resources becomes the key to the problem of renewable resources. Supercapacitors have the advantages of both batteries and traditional capacitors. They have the advantages of high power density, long cycle life, wide operating temperature limit, high energy density, fast charge and discharge rate, high efficiency, maintenance-free, and environmental protection. They have been widely used in national defen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/40H01G11/30H01G11/86
CPCH01G11/40H01G11/30H01G11/86Y02E60/13
Inventor 刘瑞来叶如娇赵瑨云胡家朋付兴平丁晓红
Owner 晋江瑞碧科技有限公司
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