@article{Zhang_Liu_Singh_Hu_Jiang_Raza_Wang_Wang_Yang_Zhu_2020, title={Superionic Conductivity in Ceria-Based Heterostructure Composites for Low-Temperature Solid Oxide Fuel Cells}, volume={12}, url={https://nmlett.org/index.php/nml/article/view/6}, DOI={10.1007/s40820-020-00518-x}, abstractNote={<p>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<sup>−2</sup> 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 new scientific understanding are discussed and presented for functional CHC materials.</p> <p>HIGHLIGHTS<br />• Ceria-based heterostructure composite for novel semiconductor-ionic fuel cells.<br />• Superionic conduction at interfaces is associated with the crossover of band structure.<br />• Band alignment/bending resultant built-in field plays a significant role in superionic conduction.</p> <p> </p>}, journal={Nano-Micro Letters}, author={Zhang, Yifei and Liu, Jingjing and Singh, Manish and Hu, Enyi and Jiang, Zheng and Raza, Rizwan and Wang, Faze and Wang, Jun and Yang, Fan and Zhu, Bin}, year={2020}, month={Aug.}, pages={178} }