期刊
CARBON
卷 113, 期 -, 页码 151-158出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2016.11.051
关键词
-
资金
- Natural Science Foundation of China [51273040, 51673038]
- National Natural Science Foundation for Distinguished Young Scholar of China [50925312]
Fiber-shaped flexible supercapacitors have attracted considerable attention in recent years due to their potential application in wearable electronics. However, the limited energy density is still a serious bottleneck which restricts their practical application. In this work, transition metal oxide nanorods/reduced graphene oxide (rGO) hybrid fibers were prepared by a facile, scalable wet-spinning method. Due to the synergetic effects between transition metal oxide nanorods and rGO, the electrochemical performance of the hybrid fibers were greatly improved. An all-solid-state asymmetric supercapacitor was constructed by using MnO2 nanorodsirGO hybrid fiber as positive electrode, MoO3 nanorodsirGO hybrid fiber as negative electrode and H3PO4/poly(vinyl alcohol) (PVA) as electrolyte. Based on the different working potential window between MnO2 and MoO3, the optimized asymmetric supercapacitor can be cycled reversibly at a high voltage of 1.6 V and deliver a superior volumetric energy density of 18.2 mWh cm(-3) at a power density of 76.4 mW cm(-3). Besides, the asymmetric supercapacitor exhibits remarkable cycling stability and excellent flexibility and mechanical stability. (C) 2016 Elsevier Ltd. All rights reserved.
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