Citation: Weixing Liu, Zhe Zhao, Baofeng Tu, Daan Cui, Dingrong Ou, Mojie Cheng. TiO₂-modified La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ cathode for intermediate temperature solid oxide fuel cells[J]. Chinese Journal of Catalysis, ;2015, 36(4): 502-508. doi: 10.1016/S1872-2067(14)60235-7 shu

TiO₂-modified La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ cathode for intermediate temperature solid oxide fuel cells

Weixing Liu ^a,b ,
Zhe Zhao ^a ,
Baofeng Tu ^a ,
Daan Cui ^a ,
Dingrong Ou ^a ,
Mojie Cheng ^a,,

1.
a Division of Fuel Cells, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;

Corresponding author: Mojie Cheng,
Received Date: 18 July 2014
Available Online: 22 September 2014
Fund Project: 国家高技术研究发展计划(863计划, 2011AA050704) (863计划, 2011AA050704) 国家重点基础研究发展计划(973计划, 2010CB732302, 2012CB215500) (973计划, 2010CB732302, 2012CB215500) 国家自然科学基金(21376238, 21306189, 51101146). (21376238, 21306189, 51101146)

A La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ(LSCF) cathode modified using nanosized TiO₂was direct prepared on the yttria stabilized zirconia (YSZ) electrolyte in an intermediate temperature solid oxide fuel cell. TiO₂ prevents reaction between LSCF and YSZ, which would have formed a SrZrO₃ phase. The cell with a LSCF-0.25 wt% TiO₂ cathode exhibited a current density that was 1.6 times larger than that with a pure LSCF cathode at 0.7 V and 600 ℃. Electrochemical impedance spectra showed the accelerated incorporation of oxygen anions into the YSZ electrolyte with the TiO₂-modified LSCF cathode. The improvement was attributed to the suppressed formation of a non-conductive SrZrO₃ layer at the cathode/electrolyte interface.
- Intermediate temperature solid oxide fuel cell,
- Cathode,
- Titanium oxide,
- Interfacial reaction,
- Zirconia-based electrolyte
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TiO₂-modified La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ cathode for intermediate temperature solid oxide fuel cells