Imperial College London
Alternate

ProfessorJohnKilner

Faculty of Engineering, Department of Materials

Senior Research Investigator
 
 
 
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Contact

 

+44 (0)20 7594 6745j.kilner Website

 
 
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Location

 

214Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Cavallaro:2018:10.1039/c7se00606c,
author = {Cavallaro, A and Pramana, S and Ruiz, Trejo E and Sherrell, P and Ware, E and Kilner, J and Skinner, SJ},
doi = {10.1039/c7se00606c},
journal = {Sustainable Energy & Fuels},
pages = {862--875},
title = {Amorphous-cathode-route towards low temperature SOFC},
url = {http://dx.doi.org/10.1039/c7se00606c},
volume = {2},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Lowering the operating temperature of solid oxide fuel cell (SOFC) devices is one of the major challenges limiting the industrial breakthrough of this technology. In this study we explore a novel approach to electrode preparation employing amorphous cathode materials. La0.8Sr0.2CoO3−δ dense films have been deposited at different temperatures using pulsed laser deposition on silicon substrates. Depending on the deposition temperature, textured polycrystalline or amorphous films have been obtained. Isotope exchange depth profiling experiments reveal that the oxygen diffusion coefficient of the amorphous film increased more than four times with respect to the crystalline materials and was accompanied by an increase of the surface exchange coefficient. No differences in the surface chemical composition between amorphous and crystalline samples were observed. Remarkably, even if the electronic conductivities measured by the Van Der Pauw method indicate that the conductivity of the amorphous material was reduced, the overall catalytic properties of the cathode itself were not affected. This finding suggests that the rate limiting step is the oxygen mobility and that the local electronic conductivity in the amorphous cathode surface is enough to preserve its catalytic properties. Different cathode materials have also been tested to prove the more general applicability of the amorphous-cathode route.
AU  - Cavallaro,A
AU  - Pramana,S
AU  - Ruiz,Trejo E
AU  - Sherrell,P
AU  - Ware,E
AU  - Kilner,J
AU  - Skinner,SJ
DO  - 10.1039/c7se00606c
EP  - 875
PY  - 2018///
SN  - 2398-4902
SP  - 862
TI  - Amorphous-cathode-route towards low temperature SOFC
T2  - Sustainable Energy & Fuels
UR  - http://dx.doi.org/10.1039/c7se00606c
UR  - http://hdl.handle.net/10044/1/56826
VL  - 2
ER  -
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