Journal
NANO RESEARCH
Volume 9, Issue 3, Pages 633-643Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-015-0943-3
Keywords
hierarchical structure; W18O49; high-power; long cycle life; supercapacitor
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Funding
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT, and Future Planning [2011-0030300]
- institutional research program of the Korea Institute of Science and Technology
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We report the facile, one-pot synthesis of 3-D urchin-like W18O49 nanostructures (U-WO) via a simple solvothermal approach. An excellent supercapacitive performance was achieved by the U-WO because of its large Brunauer-Emmett-Teller (BET) specific surface area (ca. 123 m(2)center dot g(-1)) and unique morphological and structural features. The U-WO electrodes not only exhibit a high rate-capability with a specific capacitance (Csp) of similar to 235 F center dot g(-1) at a current density of 20 A center dot g(-1), but also superior long-life performance for 1,000 cycles, and even up to 7,000 cycles, showing similar to 176 F center dot g(-1) at a high current density of 40 A center dot g(-1).
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