期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 513, 期 -, 页码 295-303出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2017.11.027
关键词
All-solid-state symmetric supercapacitors; Fiber-shaped; Skeleton/skin structure; Electrodepositing; Polyaniline
资金
- Science and Technology Project of Chengguan District, Lanzhou City, China [2014-2-1]
Polyaniline coated reduced graphene oxide/carbon nanotube composite fibers ((RGO/CNTs)@PANI, RCP) with skeleton/skin structure are designed as fiber-shaped electrodes for high performance all solid-state symmetric supercapacitor. The one-dimensional reduced graphene oxide/carbon nanotube composite fibers (RGO/CNTs, RC) are prepared via a simple in-situ reduction of graphene oxide in presence of carbon nanotubes in quartz glass pipes, which exhibit excellent mechanical performance of >193.4 MPa of tensile strength. Then polyaniline is coated onto the RC fibers by electrodepositing technique. The electrochemical properties of the RCP fiber-shaped electrodes are optimized by adjusting the feeding ratio of carbon nanotubes. The optimized one exhibits good electrochemical characteristic such as highest volumetric specific capacitance of 193.1 F cm(-3) at 1 A cm(-3), as well as excellent cyclic retention of 92.60% after 2000 cyclic voltammetry cycles. Furthermore, the all-solid-state symmetric supercapacitor, fabricated by using the final composite fiber as both positive and negative electrodes pre-coated with the poly(vinyl alcohol)/H2SO4 gel polyelectrolyte, possesses volumetric capacitance of 36.7 F cm(-3) at 0.2 A cm(-3) and could light up a red light-emitting diode easily. The excellent mechanical and electrochemical performances make the designed supercapacitor as promising high performance wearable energy storage device. (C) 2017 Elsevier Inc. All rights reserved.
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