期刊
APPLIED SURFACE SCIENCE
卷 447, 期 -, 页码 795-801出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2018.03.244
关键词
Co3O4; Carbon nanotube fibers; Specific capacitance; Fiber-shaped asymmetric supercapacitor
类别
资金
- National Natural Science Foundation of China [51522211, 51372265, 51528203, 51602339]
- Key Research Program of Frontier Science of Chinese Academy of Sciences [QYZDB-SSW-SLH031]
- Thousand Youth Talents Plan
- Natural Science Foundation of Jiangsu Province, China [BK20160399, BK20140392]
- Transformation of Scientific and Technological Achievements in Jiangsu Province [BA2016026]
- Postdoctoral Foundation of Jiangsu Province [1601065B]
- Science and Technology Project of Suzhou, China [SZS201508, ZXG201428, ZXG201401]
- Postdoctoral Foundation of China [2016M601905]
Fiber-shaped supercapacitors (FSCs) are lightweight and flexible energy storage devices that have potential applications in portable and wearable electronics. However, FSCs have flawed energy density stemming from a small specific capacitance and low operating voltage, which limits their practical application. This study puts forth a simple and effective approach to grow well-aligned three-dimensional cobalt oxide nanowire arrays (Co3O4 NWAs) directly on carbon nanotube fibers (CNTFs). The hybrid fibers obtained an ultrahigh specific capacitance of 734.25 F cm(-3) (2210 mF cm(-2)) in a three-electrode system. Benefiting from their intriguing features, we successfully fabricated an all-solid-state fiber-shaped asymmetric supercapacitor (FASC) prototype with a stable potential window of 1.6 V. Where the vanadium nitride nanowires/carbon nanotube fibers (VN NWAs/CNTFs) acted as negative electrode and the KOH poly(vinyl alcohol) (PVA) worked as the gel electrolyte. The electrochemical results suggested that the device possessed a high energy density of 13.2 mWh cm(-3) at a current density of 1.0 A cm(-3). Besides, the FASC exhibited excellent mechanical flexibility and structural stability. Therefore, this device has great potential for next-generation wearable energy-storage devices. (C) 2018 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据