skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: A durable, high-performance hollow-nanofiber cathode for intermediate-temperature fuel cells

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1338415
Grant/Contract Number:
AR0000502
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Nano Energy
Additional Journal Information:
Journal Volume: 26; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-10-08 15:39:53; Journal ID: ISSN 2211-2855
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English

Citation Formats

Chen, Yu, Bu, Yunfei, Zhao, Bote, Zhang, Yanxiang, Ding, Dong, Hu, Renzong, Wei, Tao, Rainwater, Ben, Ding, Yong, Chen, Fanglin, Yang, Chenghao, Liu, Jiang, and Liu, Meilin. A durable, high-performance hollow-nanofiber cathode for intermediate-temperature fuel cells. Netherlands: N. p., 2016. Web. doi:10.1016/j.nanoen.2016.05.001.
Chen, Yu, Bu, Yunfei, Zhao, Bote, Zhang, Yanxiang, Ding, Dong, Hu, Renzong, Wei, Tao, Rainwater, Ben, Ding, Yong, Chen, Fanglin, Yang, Chenghao, Liu, Jiang, & Liu, Meilin. A durable, high-performance hollow-nanofiber cathode for intermediate-temperature fuel cells. Netherlands. doi:10.1016/j.nanoen.2016.05.001.
Chen, Yu, Bu, Yunfei, Zhao, Bote, Zhang, Yanxiang, Ding, Dong, Hu, Renzong, Wei, Tao, Rainwater, Ben, Ding, Yong, Chen, Fanglin, Yang, Chenghao, Liu, Jiang, and Liu, Meilin. 2016. "A durable, high-performance hollow-nanofiber cathode for intermediate-temperature fuel cells". Netherlands. doi:10.1016/j.nanoen.2016.05.001.
@article{osti_1338415,
title = {A durable, high-performance hollow-nanofiber cathode for intermediate-temperature fuel cells},
author = {Chen, Yu and Bu, Yunfei and Zhao, Bote and Zhang, Yanxiang and Ding, Dong and Hu, Renzong and Wei, Tao and Rainwater, Ben and Ding, Yong and Chen, Fanglin and Yang, Chenghao and Liu, Jiang and Liu, Meilin},
abstractNote = {},
doi = {10.1016/j.nanoen.2016.05.001},
journal = {Nano Energy},
number = C,
volume = 26,
place = {Netherlands},
year = 2016,
month = 8
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.nanoen.2016.05.001

Citation Metrics:
Cited by: 4works
Citation information provided by
Web of Science

Save / Share:
  • Lanthanum strontium cobalt ferrite (LSCF) nanofibers have been fabricated by the electrospinning method and used as the cathode of an intermediate-temperature solid oxide fuel cell (SOFC) with yttria-stabilized zirconia (YSZ) electrolyte. The three-dimensional nanofiber network cathode has several advantages: (i) high porosity; (ii) high percolation; (iii) continuous pathway for charge transport; (iv) good thermal stability at the operating temperature; and (v) excellent scaffold for infiltration. The fuel cell with the monolithic LSCF nanofiber cathode exhibits a power density of 0.90 W cm -2 at 1.9 A cm -2 at 750 °C. The electrochemical performance of the fuel cell has beenmore » further improved by infiltration of 20 wt% of gadolinia-doped ceria (GDC) into the LSCF nanofiber cathode. The fuel cell with the LSCF–20% GDC composite cathode shows a power density of 1.07 W cm -2 at 1.9 A cm -2 at 750 °C. The results obtained show that one-dimensional nanostructures such as nanofibers hold great promise as electrode materials for intermediate-temperature SOFCs.« less
  • La-doped Ba{sub 0.6}Sr{sub 0.4}Co{sub 0.6}Fe{sub 0.4}O{sub 3-{delta}} perovskites were synthesized and investigated as new cathode material for intermediate temperature solid oxide fuel cells (IT-SOFCs). The structural characteristics, thermal expansion coefficient (TEC), electrical conductivity and electrochemical properties were characterized by X-ray diffraction (XRD), dilatometry, DC four-terminal method, electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) techniques. The TEC of (Ba{sub 0.6}Sr{sub 0.4}){sub 0.9}La{sub 0.1}Co{sub 0.4}Fe{sub 0.6}O{sub 3-{delta}} (BSLCF) was 14.9 x 10{sup -6} K{sup -1} at 30-800 {sup o}C, lower than Ba{sub 0.6}Sr{sub 0.4}Co{sub 0.4}Fe{sub 0.6}O{sub 3-{delta}} (BSCF) of 15.6 x 10{sup -6} K{sup -1}. The electrical conductivity of BSCF wasmore » improved by La-doping, e.g. a value of 122 S cm{sup -1} for BSLCF vs. 52 S cm{sup -1} for BSCF at 500{sup o}C, respectively. In addition, La-doping enhanced the electrochemical activity for oxygen reduction reaction. The polarization resistance of BSLCF was 0.18 {Omega} cm{sup 2} at 700 {sup o}C, about a quarter lower than that of BSCF. The improved electrochemical performance of BSLCF should be ascribed to the higher conductivity as well as the improved oxygen adsorption/desorption and oxygen ions diffusion processes.« less
  • The polarization loss due to oxygen reduction at the cathode in solid oxide fuel cells is a thermally activated process; therefore, as temperature is lowered, the loss becomes substantial. Highly active cathodes have been investigated by several groups; equally important, if not more, is the stability of these electrodes. The high performance and stable Pr 2NiO 4 cathode was studied by impedance spectroscopy and dc current–potential sweeping methods. The power density in Pr 2NiO 4-based anode supported button cells was in the range between 0.65 and 0.7 W/cm 2 at 750 degrees C at the external load of 0.8 V.more » The degradation rate at 0.8 V was approximately 3% per 1000 h up to 2000 h. The electrode resistance is a function of external loads, thus also varies with current densities. The relationship between electrode resistance and external loads is non-linear, which may changes in lattice oxygen nonstoichiometry of the cathodes.« less