Strongly enhanced ionic conductivity in hetero-structured doped-C | 57915
Journal of Fundamentals of Renewable Energy and Applications

Journal of Fundamentals of Renewable Energy and Applications
Open Access

ISSN: 2090-4541

Strongly enhanced ionic conductivity in hetero-structured doped-CeO2/SrTiO3 for solid oxide fuel cells

3rd International Conference on Battery and Fuel Cell Technology

September 10-11, 2018 | London, UK

Chen Xia and Bin Zhu

KTH Royal Institute of Technology, Sweden.
Hubei University, Wuhan, China

Posters & Accepted Abstracts: J Fundam Renewable Energy Appl

Abstract :

Since colossal ionic conductivities in 2D planar heterostructures were demonstrated, such as Y2O3-stabilized ZrO2/SrTiO3 heterostructure [1,2], tremendous efforts have been contributed to this topic even though there has been much debate surrounding it. In this work, we developed a new type of 3D hetero-structured composite material doped-CeO2/SrTiO3 to replace the conventional YSZ electrolyte layer in solid oxide fuel cells (SOFCs). As a consequence, the cells showed stable low-temperature operation and appreciable power outputs, achieving a peak power density of 0.9 W/cm2 at 550°C achieved by Sm-doped CeO2/SrTiO3 (SDC/STO) fuel cell and above 0.8 W/cm2 at the same temperature by Gd-doped CeO2/SrTiO3 (GDC/STO) fuel cell. Through investigation on the two materials from micro-structure and electrochemical perspectives, the extraordinary cell performances was found to be primarily attributed to the strongly improved ionic conduction at the heterophasic interface of the composites. This is the first study to realize greatly enhanced ionic conductivity in such heterostructured system, it brought about some new understandings on hetero-structured materials for SOFC applications.

Biography :