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Ling Y.,CAS Hefei Key Laboratory of Materials for Energy Conversion | Zhang X.,CAS Hefei Key Laboratory of Materials for Energy Conversion | Zhang X.,Jiangxi Universities for Inorganic Membranes | Wang S.,CAS Hefei Key Laboratory of Materials for Energy Conversion | And 4 more authors.
Journal of Power Sources | Year: 2010

A cobalt-free cubic perovskite oxide SrFe0.9Sb0.1O3-δ (SFSb) is investigated as a novel cathode for proton-conducting solid oxide fuel cells (H-SOFCs). XRD results show that SFSb cathode is chemically compatible with the electrolyte BaZr0.1Ce0.7Y0.1Yb0.1O3-δ (BZCYYb) for temperatures up to 1000 °C. Thin proton-conducting BZCYYb electrolyte and NiO-BaZr0.1Ce0.7Y0.1Yb0.1O3-δ (NiO-BZCYYb) anode functional layer are prepared over porous anode substrates composed of NiO-BZCYYb by a one-step dry-pressing/co-firing process. Laboratory-sized quad-layer cells of NiO-BZCYYb/NiO-BZCYYb/BZCYYb/SFSb are operated from 550 to 700 °C with humidified hydrogen (∼3% H2O) as fuel and the static air as oxidant. An open-circuit potential of 0.996 V, maximum power density of 428 mW cm-2, and a low electrode polarization resistance of 0.154 Ω cm2 are achieved at 700 °C. The experimental results indicate that the cobalt-free SFSb is a promising candidate for cathode material for H-SOFCs. © 2010 Elsevier B.V. All rights reserved. Source


Ling Y.,CAS Hefei Key Laboratory of Materials for Energy Conversion | Yao X.,CAS Hefei Key Laboratory of Materials for Energy Conversion | Zhang X.,Jiangxi Universities for Inorganic Membranes | Liu X.,CAS Hefei Key Laboratory of Materials for Energy Conversion | Lin B.,Huainan Normal University
International Journal of Hydrogen Energy | Year: 2012

A high-performance solid oxide fuel cell La1-xSr xMnO3 (LSM) cathode/metallic interconnect contact material Ni1-xCoxO, added with the mixed ionic-electronic conducting Sm0.2Ce0.8O2-δ (SDC), was proposed as a novel composite cathode for proton-conducting solid oxide fuel cells (H-SOFCs) with BaZr0.1Ce0.7Y0.1Yb 0.1O3-δ (BZCYYb) as the electrolyte. The X-ray diffraction (XRD) results indicated that the maximum doped ratio of Ni 1-xCoxO was Ni0.7Co0.3O (NC3O), also shown that NC3O was chemically compatible with SDC at temperatures up to 1400 °C. The TEC of NC3O was also measured to check its thermal compatibility with other components. Laboratory-sized tri-layer cells of NiO-BZCYYb/BZCYYb/ NC3O-SDC were fabricated and tested with humidified hydrogen (∼3% H 2O) as fuel and static air as oxidant, respectively. A maximum power density of 204 mW cm-2 and a low interfacial polarization resistance Rp of 0.683 Ω cm2 were achieved at 700 °C. The results have indicated that the NC3O-SDC composite is a simple, stable and cost-effective cathode material for H-SOFCs. © 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights. Source


Zhang X.,CAS Hefei Key Laboratory of Materials for Energy Conversion | Zhang X.,Jiangxi Universities for Inorganic Membranes | Lin B.,CAS Hefei Key Laboratory of Materials for Energy Conversion | Ling Y.,CAS Hefei Key Laboratory of Materials for Energy Conversion | And 5 more authors.
Journal of Alloys and Compounds | Year: 2010

Highly permeable porous yttria-stabilized zirconia (YSZ) hollow fiber membranes have been developed by a combined phase inversion and sintering technique. Ethanol substituting for usual water was used as the external coagulant in order to prepare YSZ hollow fiber membranes with low trans-membrane resistance. The prepared YSZ hollow fiber membranes show a special asymmetric structure with an outer skin layer, highly porous inner surface and sub-layer composed of long and large finger-like pores. The influences of sintering temperature on the microstructure, porosity and pore size distribution, bending strength and pure water flux were investigated in detail. Results show that YSZ hollow fiber membranes with high permeability and enough bending strength can be prepared using ethanol as the external coagulant and by controlling the sintering temperature. The outer-skinned YSZ hollow fiber membranes show a pure water flux of 2.27-4.30 m3 m-2 h-1 bar-1 and a bending strength of 154.5-201.7 MPa when sintered between 1350 and 1400 °C. The prepared YSZ hollow fiber membranes are suitable to be used for microfiltration and as support for other composite membranes. © 2010 Elsevier B.V. All rights reserved. Source


Zhang X.,CAS Hefei Key Laboratory of Materials for Energy Conversion | Zhang X.,Jiangxi Universities for Inorganic Membranes | Lin B.,CAS Hefei Key Laboratory of Materials for Energy Conversion | Ling Y.,CAS Hefei Key Laboratory of Materials for Energy Conversion | And 4 more authors.
Journal of Alloys and Compounds | Year: 2010

A NiO-YSZ anode-supported hollow fiber solid oxide fuel cell (HF-SOFC) has been fabricated with stable (Pr0.5Nd0.5)0.7Sr0.3MnO3-δ-YSZ (PNSM-YSZ) composite cathode. The NiO-YSZ hollow fiber anode was prepared by the immersion-induced phase inversion technique and shows a special asymmetrical structure with long and large finger-like porous structure near the lumen side of the hollow fiber. A thin and dense YSZ electrolyte membrane (about 10 μm) was deposited on the anode by a vacuum-assisted dip-coating process. The performance of the as-prepared HF-SOFC was tested at 600-800 °C with humidified H2 as fuel and ambient air as the oxidant. The peak power densities of 459, 325 and 172 mW cm-2 can be obtained at 800, 700 and 600 °C, respectively. The good performance at intermediate temperatures indicates promising applications as power sources for portable devices for the prepared YSZ-based micro-tubular SOFCs with PNSM-YSZ composite cathode. © 2010 Elsevier B.V. All rights reserved. Source

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