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Enhanced ionic conductivity of yttria-stabilized ZrO2 with natural CuFe-oxide mineral heterogeneous composite for low temperature solid oxide fuel cells |
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| Authors: | Rong Xu Yan Wu Xunying Wang Jing Zhang Xiang Yang Bin Zhu |
| Affiliation: | 1. Faculty of Materials Science and Chemistry, China University of Geosciences (Wuhan), Wuhan, PR China;2. Hubei Collaborative Innovation Center for Advanced Organic Materials, Faculty of Physics and Electronic Science, Hubei University, Wuhan, PR China;3. Department of Energy Technology, Royal Institute of Technology, Stockholm, Sweden |
| Abstract: | We report for the first time that the commercial yttrium stabilized zirconia (YSZ) nanocomposite with a natural CuFe-oxide mineral (CF) exhibits a greatly enhanced ionic conductivity in the low temperature range (500–600 °C), e.g. 0.48 S/cm at 550 °C. The CF–YSZ composite was prepared via a nanocomposite approach. Fuel cells were fabricated by using a CF–YSZ electrolyte layer between the symmetric electrodes of the Ni0.8Co0.2Al0.5Li (NCAL) coated Ni foam. The maximum power output of 562 mW/cm2 has been achieved at 550 °C. Even the CF alone to replace the electrolyte the device reached the maximum power of 281 mW/cm2 at the same temperature. Different ion-conduction mechanisms for YSZ and CF–YSZ are proposed. This work provides a new approach to develop natural mineral composites for advanced low temperature solid oxide fuel cells with a great marketability. |
| Keywords: | CuFe–oxide mineral Heterogeneous composite electrolyte Low temperature solid oxide fuel cells |
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