Synthesis of heteropoly oxometalate/amphiphilic block copolymer composite thin films with self-ordered mesostructures

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• 作者：Hui-suk Yun ; Makoto Kuwabara ; Haoshen Zhou ; Itaru Honma
• 关键词：Block copolymer templates ; Heteropoly oxometalates ; Mesostructures ; Thin films
• 刊名：Thin Solid Films
• 出版年：2007
• 期刊代码：78_00406090
• 类别：ph
• 出版时间：22 January 2007
• 卷：515
• 期：5
• 页码：2842-2846
• 文件大小：549 K

摘要

A simple, reproducible, and versatile procedure for synthesizing mesostructured 12-phosphotungstic acid thin films with large spaced mesostructures (< 17 nm) using amphiphilic block copolymers as structure-directing agents is reported. The morphology of the mesostructure can be controlled by adjusting the m/n ratio of poly (ethylene oxide)_1/2/poly (propylene oxide) (EO_1/2/PO) in the tri-block copolymer (EO)_m(PO)_n(EO)_m. This synthetic approach was adapted to prepare mesoscopically ordered heteropoly oxometalates (HPOMs) films, including 12-phosphomolybdic acid and 12-tungsto (IV) silicic acid. The electrochemical properties of the calcined HPOMs films as electrodes in Li-ion batteries were also investigated.