Enhanced long-term cathode stability by tuning interfacial nanocomposite for intermediate temperature solid oxide fuel cells

DOI: 10.1002/admi.202102131

Authors: Dingyue Hu (University of Liverpool) , Karl Dawson (University of Liverpool) , Marco Zanella (University of Liverpool) , Troy D. Manning (University of Liverpool) , Luke M. Daniels (University of Liverpool) , Nigel D. Browning (University of Liverpool; Pacific Northwest National Laboratory (PNNL)) , B. Layla Mehdi (University of Liverpool) , Yaobin Xu (Pacific Northwest National Laboratory (PNNL)) , Houari Amari (University of Liverpool) , J. Felix Shin (University of Liverpool) , Michael J. Pitcher (University of Liverpool) , Ruiyong Chen (University of Liverpool) , Hongjun Niu (University of Liverpool) , Bowen Liu (University of Liverpool,) , Matthew Bilton (University of Liverpool) , Junyoung Kim (University of Liverpool) , John B. Claridge (University of Liverpool) , Matthew J. Rosseinsky (University of Liverpool)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Advanced Materials Interfaces , VOL 3

State: Published (Approved)
Published: March 2022
Diamond Proposal Number(s): 23666

Abstract: Performance durability is one of the essential requirements for solid oxide fuel cell materials operating in the intermediate temperature range (500–700 °C). The trade-off between desirable catalytic activity and long-term stability challenges the development and commercialization of electrode materials. Here an oxygen cathode material, Ba0.5Sr0.5(Co0.7Fe0.3)0.69−xMgxW0.31O3−δ (BSCFW-xMg), that exhibits excellent electrocatalytic performance through the addition of an optimized amount of Mg to the self-assembled nanocomposite Ba0.5Sr0.5(Co0.7Fe0.3)0.69W0.31O3−δ (BSCFW) by simple solid-state reaction is reported. Distinct from the bulk and surface approaches to introduce vacancies and defects in materials design, here the Mg2+ ions concentrate at the single perovskite/double perovskite interface of BSCFW with dislocations and Mg2+-rich nanolayers, resulting in stressed and compositionally inhomogeneous interface regions. The interfacial chemistry within these nanocomposites provides an additional degree of freedom to enable performance optimization over single phase materials and promotes the durability of alkaline-earth based fuel cell materials.

Journal Keywords: cathodes; long-term stability of cathode materials; perovskite; self- assembly; solid oxide fuel cells

Diamond Keywords: Fuel Cells

Subject Areas: Materials, Chemistry, Energy


Instruments: I11-High Resolution Powder Diffraction

Added On: 31/03/2022 10:49

Documents:
Adv Materials Inter - 2022 - Hu - Enhanced Long%E2%80%90Term Cathode Stability by Tuning Interfacial Nanocomposite for Intermediate.pdf

Discipline Tags:

Energy Storage Energy Physical Chemistry Catalysis Energy Materials Chemistry Materials Science Perovskites Metallurgy

Technical Tags:

Diffraction X-ray Powder Diffraction