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Enhancement of pumping performance of electrochemical hydrogen pump by modified electrode

電極の改良による電気化学水素ポンプの水素輸送性能の向上

河村 繕範; 有田 忠昭; 磯部 兼嗣; 洲 亘; 山西 敏彦

Kawamura, Yoshinori; Arita, Tadaaki; Isobe, Kanetsugu; Shu, Wataru; Yamanishi, Toshihiko

核融合炉のブランケットトリチウム回収システム(BTR)に電気化学水素ポンプの適用が提案されている。SrCe$$_{0.95}$$Yb$$_{0.05}$$O$$_{3-alpha}$$(SCO)は水素ポンプの候補材の一つである。水素ポンプをBTRに用いるためには水素輸送性能の向上が求められる。電極の改良は水素輸送性能を向上させる手段の一つである。本研究では、白金(Pt)及びパラジウム(Pd)を電極材とし、スパッタリングにより電極を作成した。そして、それらの電気電導度,プロトン電導度を測定し、従来のPtペーストを用いた電極と比較した。スパッタ電極は従来の電極より水素輸送量が大きく、特にPdを用いた場合、水素濃度0.1%では従来の電極の4倍から5倍の輸送量を示した。

Electrochemical hydrogen pump with ceramic proton conductor membrane has been proposed to apply for a blanket tritium recovery system (BTR) of a fusion reactor. SrCe$$_{0.95}$$Yb$$_{0.05}$$O$$_{3-alpha}$$ (SCO) is one of the candidates of membrane. Modification of electrode is one of the methods to enhance the hydrogen transportation capability. In this work, the electrodes of platinum (Pt) and palladium (Pd) were attached to the SCO sample by the sputtering method (sputtering electrode), and its electric conductivity and proton conductivity were measured. Then, they were compared with that of the usual Pt paste electrode. Hydrogen transportation capability was enhanced when the sputtering electrode was applied. Especially, in case of the Pd sputtering electrode, the current density which was about 4 or 5times larger than the usual Pt paste electrode was observed at 0.1% of H$$_{2}$$ concentration.

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パーセンタイル:51.34

分野:Nuclear Science & Technology

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