期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 3, 期 42, 页码 20927-20934出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta03635f
关键词
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资金
- Guangdong Natural Science Funds for Distinguished Young Scholar [2014A030306022]
- Pearl River Rising Star Program [2014J2200066]
Flexible supercapacitors, which can sustain large deformations while maintaining normal functions and reliability, are playing an increasingly important role in portable electronic devices. Here we report the preparation of a three-dimensional alpha-Fe2O3/carbon nanotube (CNT@Fe2O3) sponge electrode with a porous hierarchical structure, consisting of a compressible, conductive CNT network, coated with a layer of Fe2O3 nanohorns. The specific capacitance of these hybrid sponges has been significantly improved to above 300 F g(-1), while the equivalent series resistance remains at about 1.5 Omega. The highly deformed CNT@Fe2O3 sponge retains more than 90% of the original specific capacitance under a compressive strain of 70% (corresponding to a volume reduction of 70%). The hybrid sponge still works stably and sustains a similar specific capacitance to the initial value even after 1000 compression cycles at a strain of 50%. The outstanding properties of this hybrid sponge make it a highly promising candidate for flexible energy devices.
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