Imperial College London
Portrait Picture

Dr Billy Wu

Faculty of Engineering, Dyson School of Design Engineering

Reader in Electrochemical Design Engineering
 
 
 
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Contact

 

+44 (0)20 7594 6385billy.wu Website

 
 
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Location

 

1M04Royal College of ScienceSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Wu:2016:10.1016/j.matdes.2016.05.096,
author = {Wu, B and Ibrahim, KA and Brandon, NP},
doi = {10.1016/j.matdes.2016.05.096},
journal = {Materials and Design},
pages = {51--59},
title = {Electrical conductivity and porosity in stainless steel 316L scaffolds for electrochemical devices fabricated using selective laser sintering},
url = {http://dx.doi.org/10.1016/j.matdes.2016.05.096},
volume = {109},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Battery electrode microstructures must be porous, to provide a large active surface area to facilitate fast charge transfer kinetics. In this work, we describe how a novel porous electrode scaffold, made from stainless steel 316L powder can be fabricated using selective laser sintering by proper selection of process parameters. Porosity, electrical conductivity and optical microscopy measurements were used to investigate the properties of fabricated samples. Our results show that a laser energy density between 1.50–2.00 J/mm2 leads to a partial laser sintering mechanism where the powder particles are partially fused together, resulting in the fabrication of electrode scaffolds with 10% or higher porosity. The sample fabricated using 2.00 J/mm2 energy density (60 W–1200 mm/s) exhibited a good electrical conductivity of 1.80 × 106 S/m with 15.61% of porosity. Moreover, we have observed the porosity changes across height for the sample fabricated at 60 W and 600 mm/s, 5.70% from base and increasing to 7.12% and 9.89% for each 2.5 mm height towards the top surface offering graded properties ideal for electrochemical devices, due to the changing thermal boundary conditions. These highly porous electrode scaffolds can be used as an electrode in electrochemical devices, potentially improving energy density and life cycle.
AU  - Wu,B
AU  - Ibrahim,KA
AU  - Brandon,NP
DO  - 10.1016/j.matdes.2016.05.096
EP  - 59
PY  - 2016///
SN  - 1873-4197
SP  - 51
TI  - Electrical conductivity and porosity in stainless steel 316L scaffolds for electrochemical devices fabricated using selective laser sintering
T2  - Materials and Design
UR  - http://dx.doi.org/10.1016/j.matdes.2016.05.096
UR  - http://www.sciencedirect.com/science/article/pii/S0264127516307080
UR  - http://hdl.handle.net/10044/1/33587
VL  - 109
ER  -
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