1
|
Qu G, Akbar M, Jin B, Yang W, Wang X, Dong W, Afzal M, Wang H, Xia C. Enhancing the Performance of the p-n Heterostructure Electrolyte for Solid Oxide Fuel Cells via A-Site-Deficiency Engineering. ACS APPLIED MATERIALS & INTERFACES 2023; 15:49154-49169. [PMID: 37819802 DOI: 10.1021/acsami.3c10501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
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.
Collapse
Affiliation(s)
- Gang Qu
- School of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China
| | - Muhammad Akbar
- School of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China
| | - Bin Jin
- School of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China
| | - Weiguang Yang
- School of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China
| | - Xunying Wang
- School of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China
- Hubei Yangtze Memory Laboratories, Wuhan 430205, China
| | - Wenjing Dong
- School of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China
- Hubei Yangtze Memory Laboratories, Wuhan 430205, China
| | - Muhammad Afzal
- Department of Energy Technology, KTH Royal Institute of Technology, Stockholm SE-10044, Sweden
| | - Hao Wang
- School of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China
- Hubei Yangtze Memory Laboratories, Wuhan 430205, China
| | - Chen Xia
- School of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China
- Hubei Yangtze Memory Laboratories, Wuhan 430205, China
| |
Collapse
|
2
|
Chen X, Wang J, Yu N, Wang Y, Zhang D, Ni M, Chen F, Liu T, Ding M. A robust direct-propane solid oxide fuel cell with hierarchically oriented full ceramic anode consisting with in-situ exsolved metallic nano-catalysts. J Memb Sci 2023. [DOI: 10.1016/j.memsci.2023.121637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
|