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Enhancing the Perfo...
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Qu, GangSchool of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China
(författare)
Enhancing the Performance of the p-n Heterostructure Electrolyte for Solid Oxide Fuel Cells via A-Site-Deficiency Engineering
- Artikel/kapitelEngelska2023
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American Chemical Society (ACS),2023
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Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:kth-339512
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-339512URI
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https://doi.org/10.1021/acsami.3c10501DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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QC 20231114
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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.
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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Akbar, MuhammadSchool of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China
(författare)
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Jin, BinSchool of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China
(författare)
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Yang, WeiguangSchool of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China
(författare)
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Wang, XunyingSchool of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China; Hubei Yangtze Memory Laboratories, Wuhan 430205, China
(författare)
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Dong, WenjingHubei Yangtze Memory Laboratories, Wuhan 430205, China; Hubei Yangtze Memory Laboratories, Wuhan 430205, China
(författare)
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Afzal, MuhammadKTH,Kraft- och värmeteknologi(Swepub:kth)u18047fk
(författare)
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Wang, HaoHubei Yangtze Memory Laboratories, Wuhan 430205, China; Hubei Yangtze Memory Laboratories, Wuhan 430205, China
(författare)
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Xia, ChenSchool of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China; School of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China
(författare)
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School of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. ChinaSchool of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China; Hubei Yangtze Memory Laboratories, Wuhan 430205, China
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:ACS Applied Materials and Interfaces: American Chemical Society (ACS)15:42, s. 49154-491691944-82441944-8252
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