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@ARTICLE{Ihrig:908471,
author = {Ihrig, Martin and Finsterbusch, Martin and Laptev,
Alexander and Tu, Chia-hao and Tran, Ngoc Thanh Thuy and
Lin, Che-an and Kuo, Liang-Yin and Ye, Ruijie and Sohn, Yoo
Jung and Kaghazchi, Payam and Lin, Shih-kang and
Fattakhova-Rohlfing, Dina and Guillon, Olivier},
title = {{S}tudy of {L}i{C}o{O} 2 /{L}i 7 {L}a 3 {Z}r 2 {O} 12 :{T}a
{I}nterface {D}egradation in {A}ll-{S}olid-{S}tate {L}ithium
{B}atteries},
journal = {ACS applied materials $\&$ interfaces},
volume = {14},
number = {9},
issn = {1944-8244},
address = {Washington, DC},
publisher = {Soc.},
reportid = {FZJ-2022-02624},
pages = {11288 - 11299},
year = {2022},
abstract = {The garnet-type Li7La3Zr2O12 (LLZO) ceramic solid
electrolyte combines high Li-ion conductivity at room
temperature with high chemical stability. Several
all-solid-state Li batteries featuring the LLZO electrolyte
and the LiCoO2 (LCO) or LiCoO2–LLZO composite cathode were
demonstrated. However, all batteries exhibit rapid capacity
fading during cycling, which is often attributed to the
formation of cracks due to volume expansion and the
contraction of LCO. Excluding the possibility of mechanical
failure due to crack formation between the LiCoO2/LLZO
interface, a detailed investigation of the LiCoO2/LLZO
interface before and after cycling clearly demonstrated
cation diffusion between LiCoO2 and the LLZO. This
electrochemically driven cation diffusion during cycling
causes the formation of an amorphous secondary phase
interlayer with high impedance, leading to the observed
capacity fading. Furthermore, thermodynamic analysis using
density functional theory confirms the possibility of low-
or non-conducting secondary phases forming during cycling
and offers an additional explanation for the observed
capacity fading. Understanding the presented degradation
paves the way to increase the cycling stability of
garnet-based all-solid-state Li batteries.},
cin = {IEK-1},
ddc = {600},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {1221 - Fundamentals and Materials (POF4-122)},
pid = {G:(DE-HGF)POF4-1221},
typ = {PUB:(DE-HGF)16},
pubmed = {35226453},
UT = {WOS:000787543300021},
doi = {10.1021/acsami.1c22246},
url = {https://juser.fz-juelich.de/record/908471},
}