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Synthesis and electrochemical properties of mesostructured 12-phosphotungstic acid thin films with hierarchical structures by triblock copolymer templating

Published online by Cambridge University Press:  01 February 2011

Hui-suk Yun ,
Makoto Kuwabara ,
Haoshen Zhou  and
Itaru Honma
Hui-suk Yun
Affiliation:
Department of Materials Science, Graduate School of Engineering, University of Tokyo, 7–3–1, Hongo, Bunkyo-ku, Tokyo, 113–8656, Japan
Makoto Kuwabara
Affiliation:
Department of Materials Science, Graduate School of Engineering, University of Tokyo, 7–3–1, Hongo, Bunkyo-ku, Tokyo, 113–8656, Japan
Haoshen Zhou
Affiliation:
National Institute of Advanced Industrial Science and Technology(AIST), Tsukuba Central 2, Energy Electronics Institute, 1–1–1, Umezono, Tsukuba, Ibaraki, 305–8568, Japan
Itaru Honma*
Affiliation:
Department of Materials Science, Graduate School of Engineering, University of Tokyo, 7–3–1, Hongo, Bunkyo-ku, Tokyo, 113–8656, Japan
*
*E-mail: [email protected]
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Abstract

Hexagonally mesostructured 12-phosphotungstic acid (PWA) thin films with both large pore size and hierarchical structures have been successfully prepared by using triblock copolymer templates for the first time. The films is composed by three kind of structures; PWA Keggin anion, monoclinic crystal structure consisting of PWA Keggin anion and organic part (hydrophilic component) of block copolymers, and the hexagonal mesostructure of self-arrayed PWA and block copolymers. The calcined PWA films show better electrochemical properties such as a faster faradic processes and larger specific capacity than normal P WA clusters.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 788: Symposium L – Continuous Nanophase and Nanostructured Materials , 2003 , L7.6
Copyright
Copyright © Materials Research Society 2004

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References

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