成果報告書詳細
管理番号20130000000491
タイトル*平成24年度中間年報 革新型蓄電池先端科学基礎研究事業 革新型蓄電池先端科学基礎研究開発 (12)
公開日2014/2/21
報告書年度2012 - 2012
委託先名国立大学法人北海道大学
プロジェクト番号P09012
部署名スマートコミュニティ部
和文要約
英文要約Development of Reversible Air Electrodes with Layered Perovskite Oxides for Next-generation Metal-Air Batteries (Hokkaido University)
The layered perovskite-type oxides,(BaYMn2O5+δ; δ = 0, 1)and BaYFe2O5+δ; δ = 0, 0.5) were prepared and their electrochemical activities for oxygen reduction reaction (ORR) were compared. The BaYMn2O5 with 1.5 eg electrons showed higher activity than the BaYMn2O6 with 0.5 eg electrons. BaYFe2O5.5 with t2g3.0 eg2.0 configuration showed higher activity than BaYFe2O5 with t2g3.5 eg2.0 configuration, suggesting that not only the number of eg electrons but also that of t2g electrons affected the catalytic activity for ORR.
Various kinds of Ruddlesden-Popper-type layered perovskite, RP-La-Sr-Fe-O (n=1, 2, 3. ∞)  were prepared and their electrochemical activity for ORR and oxygen evolution reaction (OER) were compared. Among them, RP-LaSr3Fe3O10 (n=3) functions as an ORR and OER catalyst at an equilibrium potential of 1.23 V with almost no overpotentials. Activity for ORR and OER depended on n, but not on chemical component, confirming the importance of n=3 for ORR and OER activities of layered perovskite-type oxide.
Stability of RP-LaSr3Fe3O10 (n=3) was confirmed by duration test, and addition of ethylene glycol did not affect the activity of RP-LaSr3Fe3O10.
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