Nanoscale architecture of (La0.6Sr1.4)0.95Mn0.9B0.1O4 (BCo, Ni, Cu) Ruddlesden–Popper oxides as efficient and durable catalysts for symmetrical solid oxide fuel cells

Junkai Wang, Jun Zhou, Jiaming Yang, Zheng Zong, Lei Fu, Zhongjie Lian, Xinchang Zhang, Xuan Wang, Chengxiang Chen, Wanli Ma and Kai Wu

Renewable Energy, 2020, vol. 157, issue C, 840-850

Abstract: A-site deficient (La0.6Sr1.4)0.95Mn1-xBxO4 (x = 0, 0.1, B= Co, Ni, Cu) (LSMBO4) Ruddlesden–Popper oxides were demonstrated as promising symmetrical electrodes for Sc2O3 stabilized ZrO2 (SSZ) electrolyte supported solid oxide fuel cells (SOFCs). The formation of oxygen vacancies is facilitated with the B-site transition metal doping. A-site defect promotes the exsolution of catalytic Co, Ni or Cu nanoparticles on the surface of materials in reducing atmosphere. The electrochemical performances in air and reducing atmosphere are significantly optimized via the substitution of Mn by Co, Ni or Cu and exsolved metallic nanoparticle catalysts. Especially, the materials doped by B-site with Cu shows the highest electrical conductivity of 37.54 S cm−1 and 6.82 S cm−1 and lowest polarization resistance of 0.12 Ω cm2 and 0.32 Ω cm2 at 750 °C in air and 5% H2/N2, respectively. The maximum power density of 623.1 mW cm−2 at 750 °C is achieved for an electrolyte-supported symmetrical single cell with the LSMBO4-SSZ composite electrode operating with pure H2. All these results indicate that LSMBO4 can be promising candidates for symmetric electrodes of SOFCs.

Keywords: Ruddlesden–Popper oxides; SOFC; Exsolution; A-site defect; Oxygen vacancies (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0960148120307126
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:157:y:2020:i:c:p:840-850

DOI: 10.1016/j.renene.2020.05.014

Access Statistics for this article

Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides

More articles in Renewable Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().