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林产化学与工业 ›› 2022, Vol. 42 ›› Issue (6): 99-107.doi: 10.3969/j.issn.0253-2417.2022.06.014

• 研究报告 • 上一篇    下一篇

单宁酸掺杂聚吡咯/纤维素柔性超级电容器的制备及其电化学性能研究

石方芳1, 臧利敏1,*(), 张静雨1, 邬谨泽1, 邱建辉2, 杨超1   

  1. 1. 桂林理工大学 材料科学与工程学院 有色金属及材料加工新技术教育部重点实验室, 广西 桂林 541004
    2. 秋田县立大学 系统科学学部, 由利本庄 0150055,日本
  • 收稿日期:2021-10-19 出版日期:2022-12-28 发布日期:2023-01-07
  • 通讯作者: 臧利敏 E-mail:zanglimin0705@163.com
  • 作者简介:臧利敏, 副研究员, 硕士生导师, 研究领域为柔性储能材料和可穿戴储能器件;E-mail: zanglimin0705@163.com
    石方芳(1995—), 女(壮族), 广西来宾人, 硕士生, 主要从事纤维素基功能复合材料的研究工作
  • 基金资助:
    广西自然科学基金资助项目(2019GXNSFAA245028);广西自然科学基金资助项目(2018GXNSFAA281241)

Preparation and Electrochemical Properties of Tannic Acid Doped Polypyrrole/Cellulose Flexible Supercapacitors

Fangfang SHI1, Limin ZANG1,*(), Jingyu ZHANG1, Jinze WU1, Jianhui QIU2, Chao YANG1   

  1. 1. MOE Key Laboratory of New Processing Technology for Nonferrous Metal and Materials, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China
    2. Faculty of Systems Science and Technology, Akita Prefectural University, Yurihonjo 0150055, Japan
  • Received:2021-10-19 Online:2022-12-28 Published:2023-01-07
  • Contact: Limin ZANG E-mail:zanglimin0705@163.com

摘要:

以单宁酸(TA)为电活性掺杂剂, 通过在纤维素(XWS)表面原位聚合制备了单宁酸掺杂聚吡咯(PPy)/XWS(TA/PPy/XWS)超级电容器电极材料,探讨了电极材料中各组分的作用, 以及纤维素添加量对电极材料电化学性能的影响。研究结果表明: 单宁酸能够通过可逆的氧化还原反应提供赝电容, 从而提高电极材料的比电容;单宁酸掺杂的聚吡咯包覆在纤维素表面, 可以暴露更多的活性位点, 有利于进一步提高电极材料的电化学性能;随纤维素添加量的增加, 电极材料的比电容出现先增大后减小的趋势。所制备的TA/PPy/XWS-30电极材料在电流密度0.5 A/g下的最高比电容达340.7 F/g。将其丝网印刷至滤纸上并组装成超级电容器, 该电容器的最高比电容、能量密度和功率密度分别为90.7 F/g、8.1 W·h/kg和705.8 W/kg。通过5 000次循环充/放电后电容保持率为73.8%,通过2 500次弯折循环后电容保持率为86.4%,表现出优异的循环稳定性和柔性。通过串并联和点亮计时器演示,展示了较好的应用前景。

关键词: 电活性掺杂剂, 导电聚合物, 纤维素, 柔性超级电容器

Abstract:

Tannic acid(TA) doped polypyrrole(PPy)/cellulose(XWS)(TA/PPy/XWS) supercapacitors electrodes materials were prepared via in situ polymerization on the surface of cellulose, in which TA was used as the electroactive dopant. The effects of each component in the electrodes and the cellulose content on the electrochemical performance of the electrodes were investigated. The results showed that TA could provide pseudocapacitance through reversible redox reaction, which could enhance the specific capacitance of the electrode material. The TA doped PPy particles were coated on the surface of the cellulose, which could expose more active sites to further improve the electrochemical performance of the electrodes. With the increasing cellulose content, the specific capacitance of the electrode increased at first and then decreased. The maximum specific capacitance of the prepared TA/PPy/XWS-30 electrode reached 340.7 F/g at a current density of 0.5 A/g. TA/PPy/XWS-30 was then coated on the filter paper by screen printing to assemble the flexible supercapacitor. The maximum specific capacitance, energy density and power density of the supercapacitor were 90.7 F/g, 8.1 W·h/kg and 705.8 W/kg, respectively. The capacitance retention rate was 73.8% after 5 000 charge-discharge cycles. Besides, the capacitance retention rate remains at 86.4% after 2 500 bending cycles at 180°, which exhibits excellent flexibility and charge-discharge cycling stability. The corresponding performance of the series and parallel connection and instance of lighting an electronic watch demonstrates that the supercapacitor has a good application prospect.

Key words: electroactive dopant, conductive polymer, cellulose, flexible supercapacitor

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