期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 69, 期 -, 页码 46-49出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2016.05.017
关键词
Three-dimensionally ordered macroporous structure; Pseudocapacitive effect; Li-ion diffusion coefficient; High rate capability; Vanadium oxide
资金
- National Natural Science Foundation of China [51572058, 91216123, 51174063, 51502057]
In order to act as extrinsic pseudocapacitor materials, nanoscale vanadiumoxides are required to simultaneously exhibit a capacitance-based high power density and an intercalation-based high energy density. We have fabricated a three-dimensionally ordered macroporous (3DOM) structure with a wall thickness of 14 nm that fulfills the above requirements. The 3DOM vanadium oxide film exhibits high rate performance with 355 F g(-1) at 0.5 A g(-1) and 125 F g(-1) at 15 A g(-1). The enhanced pesudocapacitive effect and Li-ion diffusion coefficient based on the 3DOM nanostructure, also contributes to the high rate capability of vanadia, which can be confirmed by cyclic voltammetry and chronoamperometry. (C) 2016 Elsevier B.V. All rights reserved.
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