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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B432MACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Jang:2022:10.1016/j.electacta.2022.140902,
author = {Jang, I and Alexander, JC and Farandos, NM and Kelsall, GH},
doi = {10.1016/j.electacta.2022.140902},
journal = {Electrochimica Acta},
pages = {1--12},
title = {Predicting optimal geometries of 3D-printed solid oxide electrochemical reactors},
url = {http://dx.doi.org/10.1016/j.electacta.2022.140902},
volume = {427},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Solid oxide electrochemical reactors (SOERs) may be operated in fuel cell (SOFC) or electrolyser (SOE) modes, at temperatures > 800 K, depending on electrolyte and electrode materials. In electrolyser mode, current densities of ≥ ca. 104 A m−2 are achievable at potential differences ideally at the thermoneutral values of 1.285 V for steam splitting or 1.46 V for CO2 splitting at 750 °C. As for large scale chemical processes in general, such reactors are required to be energy efficient, economic, of scalable design and fabrication, and durable ideally over ≥ ca. 10 years.Increasing densities of electrode | electrolyte interfacial areas (and electrode | electrolyte | pore triple phase boundaries) of solid oxide fuel cells or electrolysers offers one means of increasing performance, reproducibility, durability and potentially decreasing cost. Three-dimensional structuring of those interfaces can be achieved by 3D printing, but modelling is required to optimise geometries. Using kinetic parameter values from the literature, COMSOL Multiphysics® finite element software was used to predict effects of 3D geometries, increasing interfacial to geometric area ratios, on SOER performances for YSZ ((ZrO2)0.92(Y2O3)0.08) oxide ion conducting electrolyte and Ni-YSZ electrode based cells, relative to corresponding planar structures with < 10 μm thick planar YSZ electrolyte. For the negative electrode, electrolyte and electrode layers were inkjet printed on Ni(O)-YSZ substrate precursors, then sintered. For the positive electrode, porous lanthanum strontium manganite (LSM: La0.8Sr0.2MnO3-δ) was brush-coated over the (gas-tight) YSZ, then sintered to produce complete SOERs: H2O-H2 | Ni(O)-YSZ | YSZ-YSZ pillars | YSZ-LSM | LSM | O2.Results are reported showing that, in the case of solid YSZ pillars, despite interfacial electrode | electrolyte areas being up scaled by factors of 10–150 depending on height (10–150 μm), current densities
AU  - Jang,I
AU  - Alexander,JC
AU  - Farandos,NM
AU  - Kelsall,GH
DO  - 10.1016/j.electacta.2022.140902
EP  - 12
PY  - 2022///
SN  - 0013-4686
SP  - 1
TI  - Predicting optimal geometries of 3D-printed solid oxide electrochemical reactors
T2  - Electrochimica Acta
UR  - http://dx.doi.org/10.1016/j.electacta.2022.140902
UR  - https://www.sciencedirect.com/science/article/pii/S001346862201060X?via%3Dihub
UR  - http://hdl.handle.net/10044/1/99217
VL  - 427
ER  -
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