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@ARTICLE{Nutz:844299,
author = {Nutz, Fabian A. and Philipp, Alexandra and Kopera, Bernd A.
F. and Dulle, Martin and Retsch, Markus},
title = {{L}ow {T}hermal {C}onductivity through {D}ense {P}article
{P}ackings with {O}ptimum {D}isorder},
journal = {Advanced materials},
volume = {30},
number = {14},
issn = {0935-9648},
address = {Weinheim},
publisher = {Wiley-VCH},
reportid = {FZJ-2018-01736},
pages = {1704910},
year = {2018},
abstract = {Heat transport plays a critical role in modern batteries,
electrodes, and capacitors. This is caused by the ongoing
miniaturization of such nanotechnological devices, which
increases the local power density and hence temperature.
Even worse, the introduction of heterostructures and
interfaces is often accompanied by a reduction in thermal
conductivity, which can ultimately lead to the failure of
the entire device. Surprisingly, a fundamental understanding
of the governing heat transport processes even in simple
systems, such as binary particle mixtures is still missing.
This contribution closes this gap and elucidates how
strongly the polydispersity of a model particulate system
influences the effective thermal conductivity across such a
heterogeneous system. In a combined experimental and
modeling approach, well‐defined mixtures of monodisperse
particles with varying size ratios are investigated. The
transition from order to disorder can reduce the effective
thermal conductivity by as much as $≈50\%.$ This is caused
by an increase in the thermal transport path length and is
governed by the number of interparticle contact points.
These results are of general importance for many particulate
and heterostructured materials and will help to conceive
improved device layouts with more reliable heat dissipation
or conservation properties in the future.},
cin = {Neutronenstreuung ; JCNS-1},
ddc = {540},
cid = {I:(DE-Juel1)JCNS-1-20110106},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551) /
6215 - Soft Matter, Health and Life Sciences (POF3-621) /
6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-551 / G:(DE-HGF)POF3-6215 /
G:(DE-HGF)POF3-6G4},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29484721},
UT = {WOS:000429410300003},
doi = {10.1002/adma.201704910},
url = {https://juser.fz-juelich.de/record/844299},
}