A new highly active and CO2-stable perovskite-type cathode material for solid oxide fuel cells developed from A- and B-site cation synergy

Junxing Zhang, Ximu Li, Zhenbao Zhang, Xiaomin Xu, Yubo Chen, Yufei Song, Jie Dai, Guangming Yang, Ran Ran, Wei Zhou, Zongping Shao

科研成果: 期刊稿件文章同行评审

46 引用 (Scopus)

摘要

Improving the activity of a cathode material towards the oxygen reduction reaction (ORR) and its tolerance against CO2 impurities is of prime importance to realizing the application of solid oxide fuel cells that operate under intermediate temperatures (IT-SOFCs). Here, by adopting an A- and B-site co-doping strategy, we report a new perovskite-type oxide, Nd0.2Sr0.8Nb0.1Co0.9O3-δ (N0.2SNC), as an active and CO2-tolerant cathode material for IT-SOFCs. Compared with single-site doped Nd0.2Sr0.8CoO3-δ (N0.2SC, A-site doping) and SrNb0.1Co0.9O3-δ (SNC, B-site doping) and the parent oxide SrCoO3-δ (SC), N0.2SNC shows improved electrocatalytic activity for the ORR and superior resistance towards CO2 poisoning, achieving a low area specific resistance (ASR) of 0.037 Ω cm2 at 650 °C. In addition, the ASR value of the N0.2SNC electrode only increases from 0.08 to 0.20 Ω cm2 after operating for 300 min under an air atmosphere with 5% CO2. A- and B-site cation synergy is obtained through co-doping, leading to the improved performance. A peak power density of 1563 mW cm−2 is achieved at 650 °C. This A- and B-site cation synergy may offer a new avenue for developing high-performance and CO2-stable cathode materials for IT-SOFCs.

源语言英语
文章编号227995
期刊Journal of Power Sources
457
DOI
出版状态已出版 - 1 5月 2020

指纹

探究 'A new highly active and CO2-stable perovskite-type cathode material for solid oxide fuel cells developed from A- and B-site cation synergy' 的科研主题。它们共同构成独一无二的指纹。

引用此