高等学校化学学报 ›› 2020, Vol. 41 ›› Issue (2): 300-307.doi: 10.7503/cjcu20190480

• 物理化学 • 上一篇    下一篇

激光直写微型RGO/MWCNT/CF平面柔性超级电容器的制备及性能

关芳兰1,李昕1,*(),张群1,龚1,林紫钰1,陈耀1,王乐军2   

  1. 1. 北京服装学院材料科学与工程学院, 服装材料研究开发与评价北京市重点实验室, 北京市纺织纳米纤维工程技术研究中心, 北京 100029
    2. 恒天纤维集团有限公司, 北京 100020
  • 收稿日期:2019-09-06 出版日期:2020-02-10 发布日期:2019-11-04
  • 通讯作者: 李昕 E-mail:clylx@mail.bift.edu.cn
  • 基金资助:
    国家自然科学基金(51873003);北京市教委面上项目(KM201810012005);北京市教委面上项目(KZ201910012015);北京服装学院高水平教师队伍建设专项资金(BIFTXZ201802);北京市朝阳区协同创新项目资助(CYXC1718)

Fabrication and Capacitance Performance of Laser-machined RGO/MWCNT/CF In-plane Flexible Micro-supercapacitor

GUAN Fanglan1,LI Xin1,*(),ZHANG Qun1,GONG Yan1,LIN Ziyu1,CHEN Yao1,WANG Lejun2   

  1. 1. Beijing Key Laboratory of Clothing Materials R&D and Assessments, Beijing Engineering Research Center of Textile Nanofiber, School of Materials Science & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China
    2. Heng Tian Fiber Group Co. Ltd., Beijing 100020, China
  • Received:2019-09-06 Online:2020-02-10 Published:2019-11-04
  • Contact: Xin LI E-mail:clylx@mail.bift.edu.cn
  • Supported by:
    ? Supported by the National Natural Science Foundation of China(51873003);the Scientific and Technology of Key and General Project of Beijing Educational Committee, China(KM201810012005);the Scientific and Technology of Key and General Project of Beijing Educational Committee, China(KZ201910012015);the Special Fund for the Construction of High-level Teachers in Beijing Institute of Fashion Technology, China(BIFTXZ201802);the Beijing Chaoyang District Collaborative Innovation Project, China(CYXC1718)

摘要:

将采用改性Hummers法制备的氧化石墨烯与多壁碳纳米管(MWCNT)复合, 通过激光直写的方法制备了以棉织物(Cotton fabric, CF)为基底的石墨烯复合碳纳米管的同心圆形织物柔性平面超级电容器(RGO/MWCNT/CF). 通过扫描电子显微镜、 X 射线衍射和拉曼光谱技术对RGO/MWCNT/CF进行了表征, 并对超级电容器的电导率和电化学性能进行了测试. 结果表明, 电极材料经激光还原后导电率达到了7.19×10 4 S/m, 表现出良好的导电性能. 以RGO/MWCNT/CF为工作电极、 PVA/LiCl凝胶为电解质组装的超级电容器具有良好的电化学性能, 在电位窗口为0~1 V、 电流密度为40.8 mA/cm 2时比电容达到24 mF/cm 2, 功率密度为61 mW·h/kg, 能量密度为1.22 mW·h/kg, 且循环1000次仍能保持92%的比电容.

关键词: 还原氧化石墨烯, 多壁碳纳米管, 棉织物, 柔性超级电容器, 激光加工

Abstract:

Micro and flexible supercapacitors are promising energy storage devices that were prerequisite in smart-garment system. However, the electrochemical performance of micro-supercapacitor is lower than that of batteries. Herein, RGO/MWCNT/CF micro-supercapacitor was prepared via laser-machining of graphene oxide(GO) and multi-walled carbon nanotubes(MWCNT) on the cotton fabric(CF). The GO was reduced and MWCNT was fixed on the graphene layer when the laser sculptured the in-plane pattern on the cotton fabric. This nanomaterial shows high electrical conductivity(7. 19×10 4 S/m), attributed to the combined nanomaterials increasing the integrality of the conducting network. The best monolithic supercapacitor exhibited an area capacitance of 24 mF/cm 2 in PVA-LiCl electrolyte(PVA=polyvinyl alcohol). The energy density attained 1.22 mW·h/kg and the power density reached 61 mW·h/kg. Micro-supercapacitors exhibited remarkably high mechanical fiexibility and showed a good cycling stability, with 92% retention of the specific capacity after 1000 cycles.

Key words: Reduced graphene oxide(RGO), Multi-walled carbon nanotubes(MWCNT), Cotton fabric(CF), Flexible supercapacitor, Laser-machining

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