期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 9, 页码 9283-9290出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b19359
关键词
wet spinning; rapid phase separation; graphene fiber; high rate; flexible supercapacitors
资金
- Natural Science Foundation of China [51673038, 21702143]
- Suzhou Key Industrial Technology Innovation Project [SYG201814]
- Science and Technology Commission of Shanghai Municipality [16JC1400700]
- NSF of Jiangsu Province [BK20170377]
- University Scientific Research Project of Jiangsu Province [17KJB150035]
Graphene fiber-based supercapacitors (SCs) are rising as having the greatest potential for portable/wearable energy storage devices. However, their rate performance is not well pleasing, which greatly impedes their broad practical applications. Herein, three-dimensional porous carbon nanotube/reduced graphene oxide fibers were prepared by a nonsolvent-induced rapid phase separation method followed by hydrazine vapor reduction. Benefitting from their three-dimensional porous structure, large specific surface area, and high conductivity, the fabricated SC exhibits a high volume capacitance of 54.9 F cm(-3) and high energy and power densities (4.9 m W h cm(-3) and 15.5 W cm(-3), respectively). Remarkably, the SC works well at a high scan rate of 50 V s(-1) and shows a fast frequency response with a short time constant of 78 ms. Furthermore, the fiber-shaped SC also exhibits very stable electrochemical performances when it is subjected to mechanical bending and succeeding straightening process, indicating its great potential application in flexible electronic devices.
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