A Durable Ruddlesden‐Popper Cathode for Protonic Ceramic Fuel Cells. Issue 18 (6th August 2020)

• Record Type: Journal Article
• Authors: Huan, Daoming; Zhang, Lu; Li, Xinyu; Xie, Yun; Shi, Nai; Xue, Shuangshuang; Xia, Changrong; Peng, Ranran; Lu, Yalin
• Is Part Of: ChemSusChem. Volume 13:Issue 18(2020)
• Page Start: 4994
• Page End: 5003
• Publication Date: 2020-08-06
• Subjects: cathode -- proton-involved oxygen reduction reaction -- protonic ceramic fuel cells -- Ruddlesden-Popper oxides -- structure stability; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.202001168
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: Protonic ceramic fuel cells (PCFCs) have been proved as an efficient energy converter at intermediate temperatures. To accelerate the kinetics of the proton‐involved oxygen reduction reaction (p‐ORR), developing efficient and durable cathodes is of great importance for improving PCFCs. In this work, a new triple‐layered Ruddlesden‐Popper (R−P) structure oxide, Sr3 EuFe2.5 Co0.5 O10− δ (3‐SEFC0.5 ), was developed as a potential single‐phase cathode for PCFCs, showing high oxygen non‐stoichiometry and desirable structural thermal stability. By employing this highly active and stable single‐phase cathode, the PCFC demonstrated unprecedented low polarization resistances and exceptionally great peak power densities, which were approximately 0.030 Ω cm 2 and 900 mW cm −2 measured at 700 °C, respectively. These findings not only manifest the effectiveness of optimal doping in improving the structural stability and electrocatalytic activity in the multi‐layered perovskite family, but also highlight the great potential of using multi‐layered R−P series oxides as highly active and durable catalysts for PCFCs. Abstract : Doping for fuel cells : A triple‐layered Ruddlesden‐Popper (R−P) single‐phase cathode via Eu and Co co‐doping strategy, Sr3 EuFe3− x Co x O10− δ, is developed for protonic ceramic fuel cells, which shows highly structure stability and thermal stability at intermediate temperatures. In particular, this new R−P oxide exhibits outstanding catalytic activity toward the proton‐involved oxygen reduction reaction.