Imperial College London
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Dr Samuel J Cooper

Faculty of Engineering, Dyson School of Design Engineering

Senior Lecturer
 
 
 
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Contact

 

samuel.cooper Website

 
 
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Location

 

Dyson BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Ouyang:2021:10.1016/j.jechem.2020.07.026,
author = {Ouyang, M and Bertei, A and Cooper, SJ and Wu, Y and Boldrin, P and Liu, X and Kishimoto, M and Wang, H and Naylor, Marlow M and Chen, J and Chen, X and Xia, Y and Wu, B and Brandon, NP},
doi = {10.1016/j.jechem.2020.07.026},
journal = {Journal of Energy Chemistry},
pages = {98--112},
title = {Model-guided design of a high performance and durability Ni nanofiber/ceria matrix solid oxide fuel cell electrode},
url = {http://dx.doi.org/10.1016/j.jechem.2020.07.026},
volume = {56},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Mixed ionic electronic conductors (MIECs) have attracted increasing attention as anode materials for solid oxide fuel cells (SOFCs) and they hold great promise for lowering the operation temperature of SOFCs. However, there has been a lack of understanding of the performance-limiting factors and guidelines for rational design of composite metal-MIEC electrodes. Using a newly-developed approach based on 3D-tomography and electrochemical impedance spectroscopy, here for the first time we quantify the contribution of the dual-phase boundary (DPB) relative to the three-phase boundary (TPB) reaction pathway on real MIEC electrodes. A new design strategy is developed for Ni/gadolinium doped ceria (CGO) electrodes (a typical MIEC electrode) based on the quantitative analyses and a novel Ni/CGO fiber–matrix structure is proposed and fabricated by combining electrospinning and tape-casting methods using commercial powders. With only 11.5 vol% nickel, the designer Ni/CGO fiber–matrix electrode shows 32% and 67% lower polarization resistance than a nano-Ni impregnated CGO scaffold electrode and conventional cermet electrode respectively. The results in this paper demonstrate quantitatively using real electrode structures that enhancing DPB and hydrogen kinetics are more efficient strategies to enhance electrode performance than simply increasing TPB.
AU  - Ouyang,M
AU  - Bertei,A
AU  - Cooper,SJ
AU  - Wu,Y
AU  - Boldrin,P
AU  - Liu,X
AU  - Kishimoto,M
AU  - Wang,H
AU  - Naylor,Marlow M
AU  - Chen,J
AU  - Chen,X
AU  - Xia,Y
AU  - Wu,B
AU  - Brandon,NP
DO  - 10.1016/j.jechem.2020.07.026
EP  - 112
PY  - 2021///
SN  - 2095-4956
SP  - 98
TI  - Model-guided design of a high performance and durability Ni nanofiber/ceria matrix solid oxide fuel cell electrode
T2  - Journal of Energy Chemistry
UR  - http://dx.doi.org/10.1016/j.jechem.2020.07.026
UR  - https://www.sciencedirect.com/science/article/pii/S2095495620305210?via%3Dihub
UR  - http://hdl.handle.net/10044/1/82082
VL  - 56
ER  -
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