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Gel electrode doped with polyaniline in situ and preparation method and application of gel electrode

An in-situ doping and polyaniline technology, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, can solve the problems of losing lignin oxygen-containing groups, unfavorable electrolyte ion adsorption, and complicated activation process, etc., to achieve Achieve large-scale production, easy operation, and simple preparation process

Active Publication Date: 2021-11-16
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of electrodes, the thermal activation of lignin as a carbon precursor to synthesize large-area mesoporous carbon and electrospinning technology, the reason is that lignin has a high carbon content, but high temperature activation and spinning technology inevitably lose The oxygen-containing groups of lignin itself are not conducive to improving the adsorption of electrolyte ions
In addition, there are disadvantages of high cost and complicated activation process, so it is necessary to develop lignin electrodes with simple structure and low cost

Method used

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  • Gel electrode doped with polyaniline in situ and preparation method and application of gel electrode
  • Gel electrode doped with polyaniline in situ and preparation method and application of gel electrode
  • Gel electrode doped with polyaniline in situ and preparation method and application of gel electrode

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Embodiment 1

[0040] The preparation of embodiment 1 microcrystalline cellulose / dealkalized lignin (C / DL-1) airgel

[0041] 0.250g MCC was added to 10mL solution of 7% NaOH / 12% urea / 81% distilled water, stirred at -12°C for 30 minutes to form MCC solution; then 0.250g DL was added to dissolve in MCC solution. After DL was completely dissolved, a C / DL solution was obtained; 27.36 mmol ECH was added to the C / DL solution, and stirred rapidly for 1 hour to form a uniform solution, then transferred to a 75 mm polytetrafluoroethylene mold and cross-linked at 90 °C for 6 h, and then used Acetone and distilled water were repeatedly washed to pH 7 to obtain C / DL-1 hydrogel; after freeze-drying, C / DL-1 airgel was obtained.

Embodiment 2

[0042] Embodiment 2 Preparation of microcrystalline cellulose / dealkalized lignin (C / DL-2) airgel

[0043] 0.333g MCC was added to 10mL solution of 7% NaOH / 12% urea / 81% distilled water, stirred at -12°C for 30 minutes to form MCC solution; then 0.167g DL was added to dissolve in MCC solution. After DL was completely dissolved, a C / DL solution was obtained; 27.36 mmol ECH was added to the C / DL solution, and stirred rapidly for 1 hour to form a uniform solution, then transferred to a 75 mm polytetrafluoroethylene mold and cross-linked at 90 °C for 6 h, and then used Acetone and distilled water were repeatedly washed to pH 7 to obtain C / DL-2 hydrogel; after freeze-drying, C / DL-2 airgel was obtained.

Embodiment 3

[0044] Embodiment 3 Preparation of microcrystalline cellulose / dealkalized lignin (C / DL-3) airgel

[0045] Add 0.375g MCC to 10mL solution of 7% NaOH / 12% urea / 81% distilled water, stir at -12°C for 30 minutes to form MCC solution; then add 0.125g DL to dissolve in the MCC solution; after DL is completely dissolved , to obtain a C / DL solution; add 27.36mmol ECH to the C / DL solution, stir rapidly for 1 hour, transfer to a 75mm polytetrafluoroethylene mold after forming a uniform solution, and cross-link at 90°C for 6h, repeat with acetone and distilled water After washing to pH 7, C / DL-3 hydrogel was obtained; after freeze-drying, C / DL-3 aerogel was obtained.

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Abstract

The invention discloses a gel electrode doped with polyaniline in situ. The gel electrode comprises cellulose / dealkalized lignin aerogel and polyaniline doped in the cellulose / dealkalized lignin aerogel, wherein the cellulose / dealkalized lignin aerogel is formed by crosslinking cellulose and dealkalized lignin. The invention also discloses a preparation method of the gel electrode doped with polyaniline in situ. The preparation method comprises the steps of 1) crosslinking cellulose and dealkalized lignin to prepare cellulose / dealkalized lignin aerogel; 2) performing oxidative polymerization on the cellulose / dealkalized lignin aerogel and aniline to obtain a cross-linked composite electrode material; and 3) cleaning the composite electrode material to be neutral, freeze-drying, and performing high-pressure treatment to obtain the cross-linked composite electrode. The invention also discloses a method for preparing a supercapacitor by using the gel electrode doped with polyaniline in situ. The C / DL-PANI composite electrode material prepared by the invention has the characteristics of improved electrochemical performance, better independence, excellent mass specific capacitance, lower charge transfer resistance and the like.

Description

technical field [0001] The invention relates to the technical field of electrochemical energy storage devices. More specifically, the present invention relates to a gel electrode doped with polyaniline in situ and its preparation method and application. Background technique [0002] In recent years, flexible, lightweight, and safe energy storage devices have received extensive attention with the increasing development of wearable electronic devices. Researchers have been working on the development of independent flexible high-performance electrodes, various conductive materials, such as carbon materials (such as mesoporous carbon, carbon nanotubes, graphene and MXene, etc.), conductive polymers (such as polyaniline (PANI), Polythiophene (PEDOT) and polypyrrole (PPy), etc.) and transition metal oxides / hydroxides (such as MnO2, Co3O4, and NiOH2, etc.) are often used to make electrodes for supercapacitors. Among them, conductive polymers have become hot materials for supercap...

Claims

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Application Information

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IPC IPC(8): H01G11/26H01G11/30H01G11/48H01G11/86H01G11/84
CPCH01G11/26H01G11/30H01G11/48H01G11/86H01G11/84Y02E60/13
Inventor 胡冬英衡映琪
Owner GUANGXI UNIV
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