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@ARTICLE{Novko:867554,
author = {Novko, Dino and Zhang, Qian and Kaghazchi, Payam},
title = {{N}onadiabatic {E}ffects in {R}aman {S}pectra of {A}l {C}l
4 − -graphite {B}ased {B}atteries},
journal = {Physical review applied},
volume = {12},
number = {2},
issn = {2331-7019},
address = {College Park, Md. [u.a.]},
publisher = {American Physical Society},
reportid = {FZJ-2019-06177},
pages = {024016},
year = {2019},
abstract = {Raman spectroscopy is one of the most valuable experimental
techniques for quality assessment and structural
characterization of sample materials. As such, it has been
applied to understand the mechanism of the staging of anions
and cations into graphite-based electrodes in a variety of
energy storage devices such as Al batteries, dual-ion cells,
and Li-ion batteries. However, the correlation between the
Raman peaks and intercalation stages is still unclear in
most of these systems. This is due to the fact that the
modeling of electron-phonon coupling in highly doped
graphite systems is beyond the standard Born-Oppenheimer
approximation. Here, we simulate the Raman peaks for
AlCl−4-intercalated graphite in Al batteries by using a
nonadiabatic coupling theory. Specifically, we successfully
correlate the Raman peaks of the G phonon in AlCl−4-doped
graphite with experiment for intercalation stages 1, 2, and
4, while stage 3 appears to be absent. Stages 1 and 2 have
not been observed in experimental XRD patterns. We therefore
believe that the AlCl−4-graphite intercalation compound
has a core-shell structure with a maximum stage of 4 or 3 in
the core and 2 or 1 in the shell. In addition, the observed
intense narrow Raman bands for the Al-ion battery cathode
are due to the high level of graphite doping and are
explained in terms of low electron-phonon decay rates.},
cin = {IEK-1},
ddc = {530},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {131 - Electrochemical Storage (POF3-131)},
pid = {G:(DE-HGF)POF3-131},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000479195400003},
doi = {10.1103/PhysRevApplied.12.024016},
url = {https://juser.fz-juelich.de/record/867554},
}