Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1295823 | Solid State Ionics | 2005 | 4 Pages |
Abstract
A proton-conductive electrolyte of (NH4)2SO4/TiO2 composite was synthesized, and its proton conductivity and chemical stability at intermediate temperatures were investigated. In the composite, partial decomposition of (NH4)2SO4 occurred at around 250 °C, and the resulting materials showed high proton conductivity. The highest conductivity achieved was 15 and 35 mS cm− 1 under dry and wet atmospheres at 250 °C, respectively. The temperature dependences of the conductivity were almost reversible in any conditions investigated, and the composite was relatively stable. Under a hydrogen atmosphere, however, the reduction of (NH4)2SO4 phase occurred and the formation of H2S was observed.
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Physical Sciences and Engineering
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Authors
Hiroki Muroyama, Toshiaki Matsui, Ryuji Kikuchi, Koichi Eguchi,