期刊
NATURE COMMUNICATIONS
卷 4, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms3431
关键词
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资金
- National Basic Research Program of China [2009CB939901]
- National Natural Science Foundation of China [21222101, 11074229, 11132009, 11079004, J1030412]
- Chinese Academy of Science [XDB01020300]
- Program for New Century Excellent Talents in University
- Cockrell School of Engineering at The University of Texas at Austin
Two-dimensional materials have been an ideal material platform for constructing flexible ultrathin-film supercapacitors, offering great advantages of flexibility, ultra-thinness and even transparency. Exploring new two-dimensional pseudocapacitive materials with high electrochemical activity is needed to achieve flexible ultrathin-film supercapacitors with higher energy densities. Here we report an inorganic graphene analogue, alpha(1)-vanadyl phosphate ultrathin nanosheets with less than six atomic layers, as a promising material to construct a flexible ultrathin-film pseudocapacitor in all-solid-state. The material exhibits a high potential plateau of similar to 1.0 V in aqueous solutions, approaching the electrochemical potential window of water (1.23 V). The as-established flexible supercapacitor achieves a high redox potential (1.0 V) and a high areal capacitance of 8,360.5 mu F cm(-2), leading to a high energy density of 1.7 mWh cm(-2) and a power density of 5.2 mW cm(-2).
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