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@ARTICLE{Ihrig:891126,
author = {Ihrig, Martin and Finsterbusch, Martin and Tsai, Chih-Long
and Laptev, Alexander and Tu, Chia-hao and Bram, Martin and
Sohn, Yoo Jung and Ye, Ruijie and Sevinc, Serkan and Lin,
Shih-kang and Fattakhova-Rohlfing, Dina and Guillon,
Olivier},
title = {{L}ow temperature sintering of fully inorganic
all-solid-state batteries – {I}mpact of interfaces on full
cell performance},
journal = {Journal of power sources},
volume = {482},
issn = {0378-7753},
address = {New York, NY [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2021-01378},
pages = {228905},
year = {2021},
abstract = {One of the necessary prerequisites to advance the
electrochemical performance of Li7La3Zr2O12 (LLZ) based
all-solid-state lithium batteries is the manufacturing of
dense composite cathodes from cathode active material (CAM)
and the LLZ ceramic solid electrolyte. However, free
co-sintering of LLZ and CAM mixtures requires temperatures
above 1000 °C which often leads to decomposition and
secondary phase formation, especially for high energy CAMs.
In our study we present a completely dry processing route
which is fast, free of any sintering additives and coatings
and suitable to fabricate dense mixed cathodes, pure LLZ
separators and multilayers of the two. Through application
of high mechanical pressure during Field-Assisted Sintering
we were able to reduce the sintering temperature down to
675–750 °C with dwell times as low as 10 min, while still
obtaining $95\%$ theoretical density for LCO/LLZ mixtures.
The low sintering temperature is suitable for high energy
CAMs, but leads to a significant effect of surface
impurities, especially from powder handling in air, and
affects the crystallinity of the CAM/LLZ interface. In the
present paper we investigate the impact of resulting
interfaces on the ionic conductivity, the interfacial
impedance and the cycling stability of produced cells and
propose the optimization strategy.},
cin = {IEK-1 / JARA-ENERGY},
ddc = {620},
cid = {I:(DE-Juel1)IEK-1-20101013 / $I:(DE-82)080011_20140620$},
pnm = {122 - Elektrochemische Energiespeicherung (POF4-122)},
pid = {G:(DE-HGF)POF4-122},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000597272900007},
doi = {10.1016/j.jpowsour.2020.228905},
url = {https://juser.fz-juelich.de/record/891126},
}