Characterization of Microstructure and Conductivity of Protonic CsHSO4-SiO2  Composite Electrolytes Using Porous SiO2 Sheets

Shuqiang WANG; Junichiro OTOMO; Ching-ju WEN; Takeshi KOBAYASHI; Hidetoshi NAGAMOTO; Hiroshi TAKAHASHI

doi:10.14852/jcersjsuppl.112.0.S703.0

Journal of the Ceramic Society of Japan, Supplement 112-1, PacRim5 Special Issue

Session ID : 9

DOI https://doi.org/10.14852/jcersjsuppl.112.0.S703.0

Conference information

Host: The Ceramic Society of Japan

Co-host: Iketani Science and Technology Foundation, International Ceramic Federation, Commemorative Organization for the Japan World Exposition '70, The American Ceramic Society, The Australasian Ceramic Society, The Chinese Ceramic Society, The Korean Ceramic Society, Joint Research Consortium of Synergy Ceramics/Fine Ceramics Research Association, Nanotechnology Researchers Network Center of Japan, The Special Coordination Funds for Promoting Science and Technology, Japan National Tourist Organization, Aichi Prefectural Government, CASIO SCIENCE PROMOTION FOUNDATION, DAIKO FOUNDATION, Nagoya Convention and Visitors Bureau, The Asahi Glass Foundation, The Kao Foundation For Arts And Sciences, The Murata Science Foundation, The Ogasawara Foundation for the Promotion of Science & Engineering, ASAHI GLASS CO., LTD. Research Center, CENTRAL GLASS CO., LTD., ELECTRIC GLASS INDUSTRY ASSOCIATION OF JAPAN (EGAJ), Hattori Company, Ltd., Hitachi Research Laboratory, Hitachi, Ltd., HOYA CORPORATION, INAX Corporation, ITOCHU CERATECH CORP., Japan Cement Association, KYOCERA Corporation, KYUSHU REFRACTORIES CO., LTD., MINO CERAMIC CO., LTD., Murata Manufacturing Co., Ltd., NGK INSULATORS LTD., NGK SPARK PLUG CO., LTD., NICHIAS Corporation, NIKKO COMPANY, Nippon Electric Glass Co., Ltd., Nippon Sheet Glass Co., Ltd., NORITAKE CO., LIMITED, Tokuyama Corporation, TOTO LTD.

Papers

Characterization of Microstructure and Conductivity of Protonic CsHSO₄-SiO₂ Composite Electrolytes Using Porous SiO₂ Sheets

Shuqiang WANG, Junichiro OTOMO, Ching-ju WEN, Takeshi KOBAYASHI, Hidetoshi NAGAMOTO, Hiroshi TAKAHASHI

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Keywords: Cesium hydrogen sulphate, Silicon dioxide, Proton conductor, Composite solid electrolyte

CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract

The proton conductive CsHSO₄-SiO₂ composite electrolytes prepared by vacuum infiltration using CsHSO₄ aqueous solution and porous SiO₂ sheets with pore sizes of 1000-4 nm were investigated. XRD and DTA analyses revealed that the crystallization and phase transition of the CsHSO₄ phases filled inside the pores could be controlled by the pore sizes of the porous SiO₂ sheets. The low-temperature conductivities of the composites obtained after both drying and annealing processes were improved significantly with the decrease in pore sizes of the porous SiO₂ matrix. Particularly, the composite obtained by using the porous SiO₂ sheet with average pore size of 4 nm exhibited the superprotonic conducting characteristic down to lower temperatures below 100°C. It was evidenced that the CsHSO₄ phase filled inside the nano-pores existed in the form of mostly amorphous phase.

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