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full_archive archive 12785 staging/00/00/02/31 2016-12-12 11:51:50 2016-12-12 13:55:42 2016-12-12 11:51:50 data_collection no_search Shin Felix 467666 Rosseinsky Matthew 349260 Claridge John 351150 Xu Wen 200869631 Zanella Marco 473336 Savvin Stanislav 486514 Dawson Karl 419287 scl_psci SOFC, cathode, composite, perovskite, mixed ionic and electronic conductor, MIEC Electrode materials for intermediate temperature (500 – 700 °C) solid oxide fuel cells require electrical and mechanical stability to maintain performance during the cell lifetime. This has proven difficult to achieve for many candidate cathode materials and their derivatives with good transport and electrocatalytic properties because of reactivity towards cell components, and the fuels and oxidants. Here we present Ba0.5Sr0.5(Co0.7Fe0.3)0.6875W0.3125O3-δ (BSCFW), a self-assembled composite prepared through simple solid state synthesis, consisting of B-site cation ordered double perovskite and disordered single perovskite oxide phases. These phases interact by dynamic compositional change at the operating temperature, promoting both chemical stability through the increased amount of W in the catalytically active single perovskite provided from the W-reservoir double perovskite, and microstructural stability through reduced sintering of the supported catalytically active phase. This interactive catalyst-support system enabled stable high electrochemical activity through the synergic integration of the distinct properties of the two phases. 2016-12-06 University of Liverpool 10.17638/datacat.liverpool.ac.uk/231 EP/H000925/1 ENGINEERING & PHYSICAL SCIENCES 172 EP/N004884/1 ENGINEERING & PHYSICAL SCIENCES 172 115499 115501 2015-09-01 2020-08-31 70744 109009 2009-10-01 2015-03-31 English No access restriction