Enhanced performance and stability of La2NiO4+? impregnated La0.8Sr0.2Co0.8Ni0.2O3-? oxygen electrodes for solid oxide electrolysis cells

By Liu, Yihui; Shuang, Jingwen; Tong, Xin; Yang, Shengbing; Yang, Yong; Wei, Mingrui
Published in Electrochimica Acta 2019

Abstract

La2NiO4+? (LNO) impregnated La0.8Sr0.2Co0.8Ni0.2O3-? (LSCN) oxygen electrodes were prepared and investigated under solid oxide electrolysis cell (SOEC) operation conditions. Electrochemical results indicate that impregnating LNO into LSCN scaffold twice makes electrodes with desirable performance because LNO-LSCN oxygen electrodes take advantages of both the excellent oxygen surface exchange property of LNO and the high electronic conductivity of LSCN. The stability test of half cells shows that LNO-LSCN oxygen electrodes undergo less performance degradation than that of LNO oxygen electrodes after anodic polarization at 500 mA cm?2 and 750

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