Imperial College London
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DrInyoungJang

Faculty of Engineering, Department of Chemical Engineering

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+44 (0)7727 426 275i.jang

 
 
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Location

 

B432MACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Farandos:2022:10.1016/j.electacta.2022.140834,
author = {Farandos, NM and Jang, I and Alexander, JC and Kelsall, GH},
doi = {10.1016/j.electacta.2022.140834},
journal = {Electrochimica Acta},
pages = {1--10},
title = {3-D inkjet printed solid oxide electrochemical reactors III. cylindrical pillared electrode microstructures},
url = {http://dx.doi.org/10.1016/j.electacta.2022.140834},
volume = {426},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Inkjet printing is a scalable technique that can fabricate customised three-dimensional microstructures, reproducibly, accurately, and with high material utilisation, by printing multiple layers sequentially onto previously printed layers, to produce architectures tailored in this case to electrochemical reactors.Printable yttria-stabilised zirconia (YSZ) and lanthanum strontium manganite (LSM) inks were formulated to enable fabrication of solid oxide electrochemical reactors (SOERs): H2O-H2 | Ni(O)-YSZ | YSZ | YSZ pillars | LSM | O2. Of the geometries studied, equi-sized, hexagonally-arranged cylindrical pillars were predicted to produce the largest ratio of interfacial to geometric (cross-sectional) areas. However, this neglects effects of potential and current density distributions that constrain up-scaling to more modest factors. Hence, using kinetic parameter values from the literature, finite element computational simulations of the pillared SOER in (H2 - O2) fuel cell mode predicted peak power densities of 0.11 W cm−2 at 800 °C, whereas its counterpart with only a planar electrolyte layer produced only 0.05 W cm−2; i.e. the pillars were predicted to enhance peak power densities by ca. 2.3.Arrays of several thousand YSZ cylindrical pillars were printed, with post-sintering diameter, height, and spacing of 25, 95 and 63 μm, respectively. LSM was inkjet-printed onto the pillars, and sintered subsequently, to produce contiguous films ca. 4 μm thick. In (H2 - O2) fuel cell mode at 725, 770, and 795 °C, these reactors produced peak power densities of 0.09, 0.21, 0.30 W cm−2, respectively, 3–6 times greater than the performance of ‘benchmark’ Ni(O)-YSZ | YSZ | LSM reactors inkjet-printed with planar cathodes operating under the same conditions, thereby demonstrating the benefit of inkjet printing as a fabrication technique for SOERs.
AU  - Farandos,NM
AU  - Jang,I
AU  - Alexander,JC
AU  - Kelsall,GH
DO  - 10.1016/j.electacta.2022.140834
EP  - 10
PY  - 2022///
SN  - 0013-4686
SP  - 1
TI  - 3-D inkjet printed solid oxide electrochemical reactors III. cylindrical pillared electrode microstructures
T2  - Electrochimica Acta
UR  - http://dx.doi.org/10.1016/j.electacta.2022.140834
UR  - https://www.sciencedirect.com/science/article/pii/S0013468622009938?via%3Dihub
UR  - http://hdl.handle.net/10044/1/99218
VL  - 426
ER  -
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