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@ARTICLE{Wagner:860846,
author = {Wagner, Maximilian and Dreßler, Christian and
Lohmann-Richters, Felix and Hanus, Kevin and Sebastiani,
Daniel and Varga, Aron and Abel, Bernd},
title = {{M}echanism of {I}on {C}onductivity through
{P}olymer-{S}tabilized {C}s{H}2{PO}4 {N}anoparticular
{L}ayers from {E}xperiment and {T}heory},
journal = {Journal of materials chemistry / A},
volume = {7},
number = {48},
issn = {2050-7488},
address = {London [u.a.]},
publisher = {RSC},
reportid = {FZJ-2019-01501},
pages = {27367 - 27376},
year = {2019},
abstract = {Electrodes are currently the primary performance-limiting
component in low and intermediate temperature fuel cells. A
proven method for improving electrode performance in solid
acid fuel cells is to create ever finer nanostructures and
thus increase the electrochemically-active surface area.
However, this performance enhancement is limited by issues
of long-term stability, as well as increasing both the
electronic and ionic conduction pathways. Here, we combine a
systematic experimental study with a computational model to
quantify the effect of (1) the stabilizing polymer
polyvinylpyrrolidone as well as (2) the porosity and
electrode layer thickness on the average ionic conductivity
of the solid acid electrolyte CsH2PO4 in a composite solid
acid fuel cell electrode. With a multiscale simulation
approach using a combined molecular dynamics and lattice
Monte Carlo method, proton conduction through a porous
electrode is simulated at mesoscopic timescales while
retaining near-atomistic structured evolution.
Electrochemical impedance spectroscopy is used to evaluate
the porous electrodes obtained via spray drying. Both
approaches reveal a similar and significant contribution of
the porous electrolyte layer to the overall cell resistance.
This indicates that geometrical parameters, as well as
stabilizing materials may play an essential role when
designing a high-performance solid acid fuel cell.},
cin = {IEK-14},
ddc = {530},
cid = {I:(DE-Juel1)IEK-14-20191129},
pnm = {135 - Fuel Cells (POF3-135)},
pid = {G:(DE-HGF)POF3-135},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000502302300015},
doi = {10.1039/C9TA04275J},
url = {https://juser.fz-juelich.de/record/860846},
}