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F-doped LiNi0.8Co0....
F-doped LiNi0.8Co0.15Al0.05O2-? : cathodes with enhanced ORR catalytic activity for LT-SOFCs
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- Jiang, Cong (författare)
- Hubei Univ, Sch Microelect, Wuhan 430062, Hubei, Peoples R China.
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- Zuo, Liwen (författare)
- Hubei Univ, Sch Microelect, Wuhan 430062, Hubei, Peoples R China.
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- Liu, Yu (författare)
- Hubei Univ, Sch Microelect, Wuhan 430062, Hubei, Peoples R China.
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- Zhang, Zihao (författare)
- Hubei Univ, Sch Microelect, Wuhan 430062, Hubei, Peoples R China.
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- Wang, Kunping (författare)
- Hubei Univ, Sch Microelect, Wuhan 430062, Hubei, Peoples R China.
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- Zheng, Dan (författare)
- Hubei Yangtze Memory Labs, Wuhan 430205, Peoples R China.;Wuhan Vocat Coll Software & Engn, Sch Elect Engn, Wuhan, Peoples R China.
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- Afzal, Muhammad (författare)
- KTH,Kraft- och värmeteknologi
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- Xia, Chen (författare)
- Hubei Univ, Sch Microelect, Wuhan 430062, Hubei, Peoples R China.;Hubei Yangtze Memory Labs, Wuhan 430205, Peoples R China.
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- Wang, Baoyuan (författare)
- Hubei Univ, Sch Microelect, Wuhan 430062, Hubei, Peoples R China.;Hubei Yangtze Memory Labs, Wuhan 430205, Peoples R China.
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Hubei Univ, Sch Microelect, Wuhan 430062, Hubei, Peoples R China Hubei Yangtze Memory Labs, Wuhan 430205, Peoples R China.;Wuhan Vocat Coll Software & Engn, Sch Elect Engn, Wuhan, Peoples R China. (creator_code:org_t)
- Elsevier BV, 2023
- 2023
- Engelska.
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Ingår i: Journal of Alloys and Compounds. - : Elsevier BV. - 0925-8388 .- 1873-4669. ; 940
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Developing highly effective catalysts for oxygen reduction reaction (ORR) is crucial to enable the low-temperature operation of solid oxide fuel cells (SOFCs). Recent studies have proposed a promising O2-/H+/e- conducting oxide, LiNi0.8Co0.15Al0.05O2-delta (LNCA) with good ORR catalytic activity for SOFC cathode uses. Herein, to further optimize the cathode functionality of LNCA, a fluorine anion (F-) doping strategy is ap-plied to develop highly active LNCAF0.1 and LNCAF0.2 cathodes for Sm-doped ceria (SDC) electrolyte-based SOFCs. It is found the successful doping of F- in the oxygen site of LNCA leads to improved oxygen ionic conductivity and facilitated surface exchange and bulk diffusion of oxygen in LNCAF0.1 and LNCAF0.2, which thus gain distinctly promoted ORR catalytic activity at 450-550 degrees C, as confirmed by the decreased area specific resistances (ASR) and activation energy on symmetrical cells. The as-fabricated two SDC-based SOFCs with LNCAF0.1 and LNCAF0.2 cathodes exhibit peak power densities of 497 and 591 mW cm-2 at 550 degrees C, respectively, which are higher than that of the cell with LNCA cathode. Furthermore, the single cell with the best-performing LNCAF0.2 cathode demonstrates a good stability for 110 h at 550 degrees C. The present study thus provides a feasible strategy of F anion doping to promote the ORR catalytic activity of LNCA cathode for developing low-temperature SOFCs.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
Nyckelord
- Low-temperature SOFCs
- Cathode
- LNCA
- Fluorine doping
- Enhanced ORR activity
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- art (ämneskategori)
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