Article Title

High-power and long-life supercapacitive performance of hierarchical, 3-D urchin-like W₁₈O₄₉ nanostructure electrodes

Authors

Sangbaek Park, Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, Republic of Korea
Hyun-Woo Shim, School of Civil, Environmental and Architectural Engineering, Korea University, Seoul 136-713, Republic of Korea
Chan Woo Lee, Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, Republic of Korea
Hee Jo Song, Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, Republic of Korea
Jae-Chan Kim, School of Civil, Environmental and Architectural Engineering, Korea University, Seoul 136-713, Republic of Korea
Dong-Wan Kim, School of Civil, Environmental and Architectural Engineering, Korea University, Seoul 136-713, Republic of Korea

Keywords

hierarchical structure, W18O49, high-power, long cycle life, supercapacitor

Abstract

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 m2·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 ~235 F·g–1 at a current density of 20 A·g–1, but also superior long-life performance for 1,000 cycles, and even up to 7,000 cycles, showing ~176 F·g–1 at a high current density of 40 A·g–1.

Graphical Abstract

DOI

https://doi.org/10.1007/s12274-015-0943-3

Publisher

Tsinghua University Press

Recommended Citation

Sangbaek Park,Hyun-Woo Shim,Chan Woo Lee,Hee Jo Song,Jae-Chan Kim,Dong-Wan Kim, High-power and long-life supercapacitive performance of hierarchical, 3-D urchin-like W18O49 nanostructure electrodes. NanoRes.2016, 9(3): 633–643