Novel Perovskite Semiconductor Based on Co/Fe-Codoped LBZY (La0.5Ba0.5Co0.2Fe0.2Zr0.3Y0.3O3-δ) as an Electrolyte in Ceramic Fuel Cells
| Autor: | Naveed Mushtaq, M.A.K. Yousaf Shah, Muhammad Yousaf, Peter Lund, Zuhra Tayyab, Yuzheng Lu, Muhammad Asghar, Sajid Rauf, Muhammad Bilal Hanif, Bin Zhu |
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| Přispěvatelé: | China University of Geosciences, Wuhan, Hubei University, Southeast University, Nanjing, Xi'an Jiaotong University, New Energy Technologies, Nanjing Xiaozhuang College, Department of Applied Physics, Aalto-yliopisto, Aalto University |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Schottky junction triple-charge conduction business.industry Energy Engineering and Power Technology Co/Fe-LaBZrYO(CF-LBZY) Electrolyte electrolyte electrode semiconductor ceramic fuel cells Semiconductor Chemical engineering visual_art Materials Chemistry Electrochemistry visual_art.visual_art_medium Chemical Engineering (miscellaneous) Fuel cells Ceramic Electrical and Electronic Engineering business Perovskite (structure) |
| ISSN: | 5177-4259 |
| Popis: | Funding Information: This work was supported by the National Natural Science Foundation of China (NSFC, Grant Nos. 51774259, 51772080, and 51675496) and the Engineering Research Center of Nano-Geo Materials of Ministry of Education (NGM2017KF004, NGM2017KF012, and NGM2018KF016). Dr. Asghar acknowledges the support from the Hubei overseas Talent 100 program (as a distinguished professor at Hubei University) and the Academy of Finland (Grant No. 13329016, 13322738) for their support. Publisher Copyright: © Introducing triple-charge (H+/O2-/e-) conducting materials is a promising alternative to modify a cathode as an electrolyte in advanced ceramic fuel cells (CFC). Herein, we designed a novel triple-charge conducting perovskite-structured semiconductor Co0.2/Fe0.2-codoped La0.5Ba0.5Zr0.3Y0.3O3-δ (CF-LBZY) and used as an electrolyte and an electrode. CF-LBZY perovskite as an electrolyte exhibited high ionic (O2-/H+) conductivity of 0.23 S/cm and achieved a remarkable power density of 656 mW/cm2 550 °C. X-ray photoelectron spectroscopy (XPS) analysis revealed that the Co/Fe codoping supports the formation of oxygen vacancies at the B-site of a perovskite structure. Besides, using CF-LBZY as a cathode, the fuel cell delivered 150 and 177 mW/cm2 at 550 °C, respectively, where Y-doped BaZrO3 and Sm-doped ceria (SDC) were used as electrolytes. During the fuel-cell operation, H+ injection into the CF-LBZY electrolyte may suppress electronic conduction. Furthermore, the metal-semiconductor junction (Schottky junction) has been proposed by considering the work function and electron affinity to interpret short-circuiting avoidance in our device. The current systematic study indicates that triple-charge conduction in CF-LBZYO3-δ has potential to boost the electrochemical performance in advanced low-temperature fuel-cell technology. |
| Databáze: | OpenAIRE |
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