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Enhancing the Perfo...
Enhancing the Performance of the p-n Heterostructure Electrolyte for Solid Oxide Fuel Cells via A-Site-Deficiency Engineering
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- Qu, Gang (author)
- School of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China
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- Akbar, Muhammad (author)
- School of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China
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- Jin, Bin (author)
- School of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China
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- Yang, Weiguang (author)
- School of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China
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- Wang, Xunying (author)
- School of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China; Hubei Yangtze Memory Laboratories, Wuhan 430205, China
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- Dong, Wenjing (author)
- Hubei Yangtze Memory Laboratories, Wuhan 430205, China; Hubei Yangtze Memory Laboratories, Wuhan 430205, China
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- Afzal, Muhammad (author)
- KTH,Kraft- och värmeteknologi
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- Wang, Hao (author)
- Hubei Yangtze Memory Laboratories, Wuhan 430205, China; Hubei Yangtze Memory Laboratories, Wuhan 430205, China
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- Xia, Chen (author)
- School of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China; School of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China
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School of Microelectronics, Hubei University, Wuhan, Hubei 430062, P R. China School of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China; Hubei Yangtze Memory Laboratories, Wuhan 430205, China (creator_code:org_t)
- American Chemical Society (ACS), 2023
- 2023
- English.
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In: ACS Applied Materials and Interfaces. - : American Chemical Society (ACS). - 1944-8244 .- 1944-8252. ; 15:42, s. 49154-49169
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Semiconductor ionic electrolytes are attracting growing interest for developing low-temperature solid oxide fuel cells (LT-SOFCs). Our recent study has proposed a p-n heterostructure electrolyte based on perovskite oxide BaCo0.4Fe0.4Zr0.1Y0.1O3-δ (BCFZY) and ZnO, achieving promising fuel cell performance. Herein, to further improve the performance of the heterostructure electrolyte, an A-site-deficiency strategy is used to solely modify BCFZY for regulating the ionic conduction and catalytic activity of the heterostructure. Two new electrolytes, B0.9CFZY-ZnO and B0.8CFZY-ZnO, were developed and systematically studied. The results show that the two samples gain improved ionic conductivity and auxiliary catalytic activity after A-site deficiency as a result of the increment of the surface and interface oxygen vacancies. The single cells with B0.9CFZY-ZnO and B0.8CFZY-ZnO exhibit enhanced peak power outputs at 450-550 °C compared to the cell based on B1.0CFZY-ZnO (typically, 745 and 795 vs 542 mW cm-2 at 550 °C). Particular attention is paid to the impact of A-site deficiency on the interface energy band alignment between BxCFZY and ZnO, which suggests that the p-n heterojunction effect of BxCFZY-ZnO for charge carrier regulation can be tuned by A-site deficiency to enable high proton transport while avoiding fuel cell current leakage. This study thus confirms the feasibility of A-site-deficiency engineering to optimize the performance of the heterostructure electrolyte for developing LT-SOFCs.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
Keyword
- A-site deficiency
- BxCFZY-ZnO
- energy band alignment
- heterostructure electrolyte
- SOFCs
Publication and Content Type
- ref (subject category)
- art (subject category)
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