Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Key Laboratory of Ferro & Piezoelectric Materials and Devices of Hubei Province, Faculty of Physics and Electronic Science , Hubei University , Wuhan 430062 , Hubei , China.
Department of Aeronautical & Automotive Engineering , Loughborough University , Loughborough LE11 3TU , United Kingdom.
ACS Appl Mater Interfaces. 2018 Oct 3;10(39):33179-33186. doi: 10.1021/acsami.8b10087. Epub 2018 Sep 24.
A solid oxide fuel cell's performance is largely determined by the ionic-conducting electrolyte. A novel approach is presented for using the semiconductor perovskite LaSrTiO (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 cm at just 550 °C. The prepared LST materials formed a heterostructure, including an insulating core and a superionic 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 O conductivity of 0.221 S cm at 550 °C, leading to excellent current and power outputs.
固体氧化物燃料电池的性能在很大程度上取决于离子导电电解质。本文提出了一种新方法，通过在半导体钙钛矿 LaSrTiO（LST）表面形成超离子传导，将其用作电解质，结果表明，LST 电解质在 550°C 时即可提供卓越的功率密度，达到 908.2 mW cm。所制备的 LST 材料形成了异质结构，包括绝缘核和超离子传导表面层。氧离子沿着表面或晶界的快速离子迁移被认为是主要的离子传导方式。在 550°C 时，观察到由绝缘 LST 向超 O 电导率为 0.221 S cm 的相转变，从而导致了出色的电流和功率输出。
