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@ARTICLE{Zhang:897456,
author = {Zhang, Qian and Schierholz, Roland and Dzieciol, Krzysztof
and Yu, Shicheng and Tempel, Hermann and Kungl, Hans and
Eichel, Rüdiger-A.},
title = {{M}icrostructural details of spindle-like lithium
titaniumphosphate revealed in three dimensions},
journal = {RSC Advances},
volume = {11},
number = {55},
issn = {2046-2069},
address = {London},
publisher = {RSC Publishing},
reportid = {FZJ-2021-03794},
pages = {34605 - 34612},
year = {2021},
abstract = {Lithium titanium phosphate LiTi2(PO4)3 is an electrode
material for lithium-ion batteries with a specific capacity
of 138 mA h g−1. Owing to its potential of 2.5 V vs.
Li/Li+ it provides an electrochemically stable interface
when used as an anode in all-solid state batteries with
NASICON type lithium aluminium titanium phosphate
electrolyte. High performance has been identified for in
situ carbon coated LiTi2(PO4)3 synthesized via a
hydrothermal route, resulting in micro-scaled spindle shaped
particles consisting of nano-scaled sub-particles. To
elucidate the internal microstructure of these spindle-like
particles in three dimensions we applied tomographic Focused
Ion Beam – Scanning Electron Microscopy. For more detailed
chemical analysis we performed electron-energy loss
spectroscopy and energy dispersive X-ray spectroscopy in the
scanning electron microscope as well as high resolution
(scanning) transmission electron microscopy for structural
insight. It could be clearly shown that the spindle-like
particles mainly are made up of LiTi2(PO4)3 sub-particles in
the 100 to 400 nm range. Additionally, two types of
secondary phase materials were identified. LiTiOPO4, which
shows different surface morphology, as a volume component of
the spindles and TiO2 nanoparticles (anatase), which are not
only present at the particle surface but also inside the
spindle, were detected. Reconstruction from tomography
reveals the nanoparticles form a three-dimensionally
interconnected network even though their phase fraction is
low.},
cin = {IEK-9},
ddc = {540},
cid = {I:(DE-Juel1)IEK-9-20110218},
pnm = {1223 - Batteries in Application (POF4-122)},
pid = {G:(DE-HGF)POF4-1223},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000711118300001},
doi = {10.1039/D1RA05754E},
url = {https://juser.fz-juelich.de/record/897456},
}