Imperial College London
Dr Vladimir Yufit

DrVladimirYufit

Faculty of Engineering, Department of Earth Science & Engineering

Visiting Researcher
 
 
 
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Contact

 

+44 (0)20 7594 1186v.yufit

 
 
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Location

 

3.58Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Bertei:2016:10.1149/2.0501702jes,
author = {Bertei, A and Tariq, F and Yufit, V and Ruiz, Trejo E and Brandon, N},
doi = {10.1149/2.0501702jes},
journal = {Journal of the Electrochemical Society},
pages = {F89--F98},
title = {Guidelines for the rational design and engineering of 3D manufactured solid oxide fuel cell composite electrodes},
url = {http://dx.doi.org/10.1149/2.0501702jes},
volume = {164},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The  growth  of  3D  printing  has  opened  the  scope  for  designing  microstructures  for  solid oxide  fuel  cells(SOFCs)  with  improved  power  density  and  lifetime.  This  technique  can introduce structural modifications at a scale larger than particle size but smaller than cell size, such  as  by  insertingelectrolyte  pillars  of  ~5-100 µm.  This  study  sets  the  minimum requirements  for  the  rational  design  of  3D  printedelectrodes  based  on  an  electrochemical model and analytical solutions for functional layers with negligible electronic resistanceand no  mixed  conduction.  Results  show  that  this  structural  modification  enhances  the  power density  when  the ratio keffbetween  effective  conductivity  and  bulk  conductivity  of  the  ionic phase is smaller than 0.5. The maximum performance improvement is predicted as a function of keff.  A  design  study  on  a  wide  range  of  pillar  shapes  indicates  that  improvements  are achieved   by   any   structural   modification   which   provides   ionic   conduction   up   to   a characteristic  thickness  ~10-40 µm  without  removing  active  volume  at  the  electrolyte interface.  The  best  performance  is  reached  for  thin  (<  ~2 µm)  and  long  (>  ~80 µm)  pillars when  the  compositeelectrode  is  optimised  for  maximum  three-phase  boundarydensity, pointing towards the design of scaffolds with well-defined geometry and fractal structures.
AU  - Bertei,A
AU  - Tariq,F
AU  - Yufit,V
AU  - Ruiz,Trejo E
AU  - Brandon,N
DO  - 10.1149/2.0501702jes
EP  - 98
PY  - 2016///
SN  - 0013-4651
SP  - 89
TI  - Guidelines for the rational design and engineering of 3D manufactured solid oxide fuel cell composite electrodes
T2  - Journal of the Electrochemical Society
UR  - http://dx.doi.org/10.1149/2.0501702jes
UR  - http://hdl.handle.net/10044/1/42971
VL  - 164
ER  -
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