Superionic Conductivity in Ceria?Based Heterostructure Composites for Low?Temperature Solid Oxide Fuel Cells

• 作者: Bin Zhu Enyi Hu Fan Yang Faze Wang Jingjing Liu Jun Wang Manish Singh Rizwan Raza Yifei Zhang Zheng Jiang
• 来源期刊: 纳微快报（英文）
• 年，卷（期）: 2020,（12）
• 页码范围: 264-283
• 页数: 20页
• 语种: 英文

摘要

Ceria-based heterostructure composite (CHC) has become a new stream to develop advanced low-temperature (300–600 °C) solid oxide fuel cells (LTSOFCs) with excellent power outputs at 1000 mW -cm?2 level. The state-of-the-art ceria–carbonate or ceria–semiconductor heterostructure composites have made the CHC systems significantly contribute to both fundamental and applied science researches of LTSOFCs; however, a deep scientific understanding to achieve excellent fuel cell performance and high superionic conduction is still missing, which may hinder its wide application and commercialization. This review aims to establish a new fundamental strategy for superionic conduction of the CHC materials and relevant LTSOFCs. This involves energy band and built-in-field assisting superionic conduction, highlighting coupling effect among the ionic transfer, band structure and alignment impact. Furthermore, theories of ceria–carbonate, e.g., space charge and multi-ion conduction, as well as newscientific understanding are discussed and presented for functional CHC materials.