Imperial College London

Professor Nigel Brandon OBE FREng

Faculty of Engineering

Dean of the Faculty of Engineering



+44 (0)20 7594 8600n.brandon Website




2.06Faculty BuildingSouth Kensington Campus






BibTex format

author = {Cooper, SJ and Bertei, A and Finegan, DP and Brandon, NP},
doi = {10.1016/j.electacta.2017.07.152},
journal = {Electrochimica Acta},
pages = {681--689},
title = {Simulated impedance of diffusion in porous media},
url = {},
volume = {251},
year = {2017}

RIS format (EndNote, RefMan)

AB - This paper describes the use of a frequency domain, finite-difference scheme to simulate the impedance spectra of diffusion in porous microstructures. Both open and closed systems are investigated for a range of ideal geometries, as well as some randomly generated synthetic volumes and tomographically derived microstructural data. In many cases, the spectra deviate significantly from the conventional Warburg-type elements typically used to represent diffusion in equivalent circuit analysis. A key finding is that certain microstructures show multiple peaks in the complex plane, which may be misinterpreted as separate electrochemical processes in real impedance data. This is relevant to battery electrode design as the techniques for nano-scale fabrication become more widespread. This simulation tool is provided as an open-source MatLab application and is freely available online as part of the TauFactor platform.
AU - Cooper,SJ
AU - Bertei,A
AU - Finegan,DP
AU - Brandon,NP
DO - 10.1016/j.electacta.2017.07.152
EP - 689
PY - 2017///
SN - 0013-4686
SP - 681
TI - Simulated impedance of diffusion in porous media
T2 - Electrochimica Acta
UR -
UR -
VL - 251
ER -