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Study on charge transportation in the layer-structured oxide composite of SOFCs
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- Liu, Xueqi (author)
- Hubei Univ, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Key Lab Ferro & Piezoelect Mat & Devices Hubei Pr, Fac Phys & Elect Sci, Wuhan 430062, Hubei, Peoples R China.
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- Dong, Wenjing (author)
- Hubei Univ, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Key Lab Ferro & Piezoelect Mat & Devices Hubei Pr, Fac Phys & Elect Sci, Wuhan 430062, Hubei, Peoples R China.
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- Xia, Chen (author)
- KTH,Energiteknik,Royal Inst Technol, Dept Energy Technol, S-10044 Stockholm, Sweden.
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- Hubei Univ, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Key Lab Ferro & Piezoelect Mat & Devices Hubei Pr, Fac Phys & Elect Sci, Wuhan 430062, Hubei, Peoples R China Energiteknik (creator_code:org_t)
- Elsevier, 2018
- 2018
- English.
- In: International journal of hydrogen energy. - : Elsevier. - 0360-3199 .- 1879-3487. ; 43:28, s. 12773-12781
- Journal article (peer-reviewed)
Abstract
Subject headings
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- In the past few years, triple (H+/O2-/e(-)) conducting materials have been regarded as one of the most promising electrode categories for solid oxide fuel cells (SOFCs). In this work, a layer-structured LiNi0.8Co0.15Al0.05O2-delta (LNCA) with triple conduction has been studied. The semiconductor-ionic conductor (SIC) LNCA-SDC composite has been fabricated by compositing the LNCA material with ionic conductor, i.e., samarium doped ceria (SDC). The electrochemical performance of the LNCA-SDC composite was studied by electrochemical impedance spectroscopy, while its electronic conductivity was confirmed by d.c. polarization method. It is found that the ionic conductivity of the composite is higher than the electronic conductivity by several orders of magnitude. The charge carriers and transportation properties of LNCA-SDC were studied using H+ and O2- blocking layer cells respectively. Results prove that the LNCA-SDC composite is a hybrid oxygen ion-proton conducting material. The oxygen ion conduction is dominated at low temperature (425 -500 degrees C), however, it is comparable with H+ conduction at high temperature (550 degrees C). Additionally, the formation of Li2CO3 under fuel cell operation environment was observed and the mechanism of the hybrid conductivity of LNCA-SDC was studied.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
Keyword
- Charge carrier transportation
- Semiconductor-ionic conductor
- Hybrid O2-/H+ conduction
- Low-temperature SOFC
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Liu, Xueqi
- Dong, Wenjing
- Xia, Chen
- Huang, Qiuan
- Cai, Yixiao
- Wei, Lili
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- Wu, Guitai
- Wang, Xunying
- Tong, Yuzhu
- Qiao, Zheng
- Meng, Yuanjing
- Mushtaq, Naveed
- Wang, Baoyuan
- Wang, Hao
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- Royal Institute of Technology
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