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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

Förlag, utgivningsår, omfång ...

  • American Chemical Society (ACS),2023
  • printrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:kth-339512
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-339512URI
  • https://doi.org/10.1021/acsami.3c10501DOI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • QC 20231114
  • 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.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Akbar, MuhammadSchool of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China (författare)
  • Jin, BinSchool of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China (författare)
  • Yang, WeiguangSchool of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China (författare)
  • Wang, XunyingSchool of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China; Hubei Yangtze Memory Laboratories, Wuhan 430205, China (författare)
  • Dong, WenjingHubei Yangtze Memory Laboratories, Wuhan 430205, China; Hubei Yangtze Memory Laboratories, Wuhan 430205, China (författare)
  • Afzal, MuhammadKTH,Kraft- och värmeteknologi(Swepub:kth)u18047fk (författare)
  • Wang, HaoHubei Yangtze Memory Laboratories, Wuhan 430205, China; Hubei Yangtze Memory Laboratories, Wuhan 430205, China (författare)
  • Xia, ChenSchool of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China; School of Microelectronics, Hubei University, Wuhan, Hubei 430062, P. R. China (författare)
  • 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

  • Ingår i:ACS Applied Materials and Interfaces: American Chemical Society (ACS)15:42, s. 49154-491691944-82441944-8252

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