Advanced fuel cell based on Perovskite La-SrTiO3 semiconductor as the electrolyte with superoxide-ion conduction
journal contributionposted on 07.09.2018 by Gang Chen, Bin Zhu, Hui Deng, Yadan Luo, Wenkang Sun, Hailiang Liu, Wei [Hubei University] Zhang, Xunying Wang, Yumin Qian, Xianwei Hu, Shujiang Geng, Jung-Sik Kim
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A solid oxide fuel cell’s (SOFC) performance is largely determined by the ionic-conducting electrolyte. A novel approach is presented for using the semiconductor perovskite LaR0.25RSrR0.75RTiOR3R (LST) as the electrolyte by creating surface superionic conduction, and the authors show that the LST electrolyte can deliver superior power density, 908.2 mW·cmP-2P at just 550 °C. The prepared LST materials formed a heterostructure including an insulating core and a super ionic conducting surface layer. The rapid ion transport along the surfaces or grain boundaries was identified as the primary means of oxygen ion conduction. The fuel cell-induced phase transition was observed from the insulating LST to a super OP2-P conductivity of 0.221 S·cmP-1P at 550 °C, leading to excellent current and power outputs.
The authors thank the National Natural Science Foundation of China (No. 51302033), the Fundamental Research Funds for the Central Universities (No. N172504025), the Natural Science Foundation of Liaoning and Hubei Province (No. 2015020637 and 2015CFA120), the Swedish Research Council (Grant No. 621-2011-4983), and the European Commission FP7 TriSOFC-project (Grant No. 303454) for the financial support.
- Aeronautical, Automotive, Chemical and Materials Engineering
- Aeronautical and Automotive Engineering