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Title: Semiconductor-ionic membrane of LaSrCoFe-oxide-doped ceria solid oxide fuel cells
Authors: Wang, Baoyuan
Cai, Yixiao
Xia, Chen
Kim, Jung-Sik
Liu, Yanyan
Dong, Wenjing
Wang, Hao
Afzal, Muhammad
Li, Junjiao
Raza, Rizwan
Zhu, Bin
Keywords: Semiconductor-ionic membrane
Solid oxide fuel cells
Co-doped ceria
Schottky junction
Short circuit
Issue Date: 2017
Publisher: © Elsevier
Citation: WANG, B. ... et al, 2017. Semiconductor-ionic membrane of LaSrCoFe-oxide-doped ceria solid oxide fuel cells. Electrochimica Acta, 248, pp. 496-504.
Abstract: A novel semiconductor-ionic La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ (LSCF)-Sm/Ca co-doped CeO 2 (SCDC) nanocomposite has been developed as a membrane, which is sandwiched between two layers of Ni 0.8 Co 0.15 Al 0.05 Li-oxide (NCAL) to construct semiconductor-ion membrane fuel cell (SIMFC). Such a device presented an open circuit voltage (OCV) above 1.0 V and maximum power density of 814 mW cm −2 at 550 °C, which is much higher than 0.84 V and 300 mW cm −2 for the fuel cell using the SCDC membrane. Moreover, the SIMFC has a relatively promising long-term stability, the voltage can maintain at 0.966 V for 60 hours without degradation during the fuel cells operation and the open-circuit voltage (OCV) can return to 1.06 V after long-term fuel cell operation. The introduction of LSCF electronic conductor into the membrane did not cause any short circuit but brought significant enhancement of fuel cell performances. The Schottky junction is proposed to prevent the internal electrons passing thus avoiding the device short circuiting problem.
Description: This paper is closed access until 24th July 2018.
Sponsor: Financial support are from the National Natural Science Foundation of China (Grant 51372075, 51502084), the Swedish Research Council (VR, Contract No. 621-2011-4983) and the EC FP7 TriSOFC project (Contract No. 303454). The joint technical development financed by Nanjing YuanNan Nano-Tech. Ltd is also acknowledged.
Version: Accepted for publication
DOI: 10.1016/j.electacta.2017.07.128
URI: https://dspace.lboro.ac.uk/2134/26249
Publisher Link: http://dx.doi.org/10.1016/j.electacta.2017.07.128
ISSN: 0013-4686
Appears in Collections:Closed Access (Aeronautical and Automotive Engineering)

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