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Understanding the e...
Understanding the electrochemical mechanism of the core-shell ceria-LiZnO nanocomposite in a low temperature solid oxide fuel cell
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- Fan, Liangdong (författare)
- KTH,Kraft- och värmeteknologi
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Ma, Ying (författare)
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- Wang, Xiaodi (författare)
- KTH,Funktionella material, FNM
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- Singh, Manish (författare)
- KTH,Energiteknik
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- Zhu, Bin (författare)
- KTH,Kraft- och värmeteknologi
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(creator_code:org_t)
- Royal Society of Chemistry (RSC), 2014
- 2014
- Engelska.
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Ingår i: Journal of Materials Chemistry A. - : Royal Society of Chemistry (RSC). - 2050-7488 .- 2050-7496. ; 2:15, s. 5399-5407
- 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
- Ceria based solid solutions have been considered some of the best candidates to develop intermediate/low temperature solid oxide fuel cells (IT/LT-SOFCs, 600-800 degrees C). However, the barrier to commercialization has not been overcome even after numerous research activities due to its inherent electronic conduction in a reducing atmosphere and inadequate ionic conductivity at low temperatures. The present work reports a new type of all-oxide nanocomposite electrolyte material based on a semiconductor, Li-doped ZnO (LixZnO), and an ionic conductor, samarium doped ceria (SDC). This electrolyte exhibits superionic conductivity (>0.1 S cm(-1) over 300 degrees C), net-electron free and excellent electrolytic performances (400-630 mW cm(-2)) between 480 and 550 degrees C. Particularly, defects related to interfacial conduction and the intrinsic and extrinsic properties of ions are analysed. An internal or interfacial redox process on two-phase particles is suggested as a powerful methodology to overcome the internal short-circuit problem of ceria-based single phase materials and to develop new advanced materials for energy related applications. The combination of the above promising features makes the SDC-LiZnO nanocomposite a promising electrolyte for LTSOFCs.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Nyckelord
- Electrolytes
- Ionic conductivity
- Lithium
- Nanocomposites
- Zinc oxide
- Electrochemical mechanisms
- Electronic conduction
- Low temperature solid oxide fuel cells
- Nanocomposite electrolytes
- Reducing atmosphere
- Samarium doped cerias
- Single-phase materials
- Superionic conductivity
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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