机械剥离石墨片/聚3,4-乙烯二氧噻吩电极的制备及其超电容性能研究

周海涵; 任梦瑶; 翟华金

doi:10.11777/j.issn1000-3304.2022.22032

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机械剥离石墨片/聚3,4-乙烯二氧噻吩电极的制备及其超电容性能研究

研究论文 | 更新时间：2024-10-08

- 机械剥离石墨片/聚3,4-乙烯二氧噻吩电极的制备及其超电容性能研究
- Preparation of Mechanically Exfoliated Graphite Sheet/Poly(3,4-ethylenedioxythiophene) Electrodes and the Study on Their Supercapacitive Properties
- 高分子学报 2022年53卷第8期页码：952-961
- 作者机构：
  
  山西大学分子科学研究所能量转换与存储材料山西省重点实验室太原 030006
- 作者简介：
  
  E-mail: hhzhou@sxu.edu.cn
  hj.zhai@sxu.edu.cn
- 基金信息：
  
  国家自然科学基金(基金号 ┣21975147;21873058);21601113, 21573138┫
- DOI：10.11777/j.issn1000-3304.2022.22032
  中图分类号：
- 纸质出版日期：2022-08-20，
  
  网络出版日期：2022-06-09，
  
  收稿日期：2022-01-26，
  
  修回日期：2022-03-14，
- 稿件说明：
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周海涵,任梦瑶,翟华金.机械剥离石墨片/聚3,4-乙烯二氧噻吩电极的制备及其超电容性能研究[J].高分子学报,2022,53(08):952-961.

Zhou Hai-han,Ren Meng-yao,Zhai Hua-jin.Preparation of Mechanically Exfoliated Graphite Sheet/Poly(3,4-ethylenedioxythiophene) Electrodes and the Study on Their Supercapacitive Properties[J].ACTA POLYMERICA SINICA,2022,53(08):952-961.
周海涵,任梦瑶,翟华金.机械剥离石墨片/聚3,4-乙烯二氧噻吩电极的制备及其超电容性能研究[J].高分子学报,2022,53(08):952-961. DOI： 10.11777/j.issn1000-3304.2022.22032.

Zhou Hai-han,Ren Meng-yao,Zhai Hua-jin.Preparation of Mechanically Exfoliated Graphite Sheet/Poly(3,4-ethylenedioxythiophene) Electrodes and the Study on Their Supercapacitive Properties[J].ACTA POLYMERICA SINICA,2022,53(08):952-961. DOI： 10.11777/j.issn1000-3304.2022.22032.

摘要

石墨片(graphite sheet，GS)由于其低成本和高导电性的特征，在超级电容器中具有很好的商业应用前景. 然而，GS的二维光滑表面会与电活性材料之间形成不理想的界面，从而限制了它们之间的电荷传输. 这项工作提出了一种简单的机械剥离方法来对GS进行处理，获得了具有独特分层微结构的机械剥离石墨片(mechanically exfoliated graphite sheet，MEGS)集流体. 同时，详细研究了电聚合参数对作为电活性材料的聚3

4-乙烯二氧噻吩(PEDOT)超电容性能的影响. 电化学测试表明，通过优化电聚合参数能使得PEDOT电极的电化学性能得到显著提高. 更重要的是，与GS集流体相比，通过使用MEGS集流体，能使得所制备的PEDOT电极的电化学性能被进一步显著提升. 这能归因于PEDOT膜与MEGS集流体之间所构建的三维界面. 所制备的MEGS/PEDOT电极在0.5 mA·cm

-2

充放电电流密度下获得了96.2 mF·cm

-2

的面积电容，并具有高的倍率性能以及优异的循环稳定性(10000次循环后保持了初始电容的90.6%). 这些特征使其在高性能超级电容器具有大的应用潜力.

Abstract

Graphite sheet (GS) is very promising for commercial use in SCs

due to its low cost and high conductivity. Nevertheless

the 2D flat surface of GS would limit the charge transport between GS and electroactive materials

because of the dissatisfactory interface being formed. Here

a facile mechanically exfoliated method is p

roposed to treat GS to obtain mechanically exfoliated GS (MEGS) as current collector

which shows a unique layered microstructures. And meanwhile

the electropolymerization parameter-dependent supercapacitive performance of the poly(3

4-ethylenedioxythiophene) (PEDOT) films as the electroactive material is investigated in detail. Electrochemical measurements verify that the electrochemical properties of PEDOT electrodes are substantially enhanced by using optimized electropolymerization parameters. More importantly

the electrochemical properties of PEDOT electrodes are further observably boosted through using MEGS current collector compared to GS

attributed to the 3D interface established between the PEDOT films and MEGS. The resulting MEGS/PEDOT electrodes yield areal capacitance of 96.2 mF·cm

-2

at 0.5 mA·cm

-2

superior rate performance

and remarkable cycling stability (90.6% of capacitance retention for 10000 cycles). Such characteristics of MEGS/PEDOT electrodes offer great promise in high performance supercapacitor applications.

关键词

电荷存储电化学电容器柔性器件电化学性能

Keywords

Charge storageElectrochemical capacitorsFlexible devicesElectrochemical properties

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