TY  - JOUR
AU  - Stegmaier, Sina
AU  - Schierholz, Roland
AU  - Povstugar, Ivan
AU  - Barthel, Juri
AU  - Rittmeyer, Simon P.
AU  - Yu, Shicheng
AU  - Wengert, Simon
AU  - Rostami, Samare
AU  - Kungl, Hans
AU  - Reuter, Karsten
AU  - Eichel, Rüdiger-A.
AU  - Scheurer, Christoph
TI  - Nano‐Scale Complexions Facilitate Li Dendrite‐Free Operation in LATP Solid‐State Electrolyte
JO  - Advanced energy materials
VL  - 11
IS  - 26
SN  - 1614-6840
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2021-02873
SP  - 2100707 -
PY  - 2021
AB  - Dendrite formation and growth remains a major obstacle toward high-performance all solid-state batteries using Li metal anodes. The ceramic Li(1+x)Al(x)Ti(2−x)(PO4)3 (LATP) solid-state electrolyte shows a higher than expected stability against electrochemical decomposition despite a bulk electronic conductivity that exceeds a recently postulated threshold for dendrite-free operation. Here, transmission electron microscopy, atom probe tomography, and first-principles based simulations are combined to establish atomistic structural models of glass-amorphous LATP grain boundaries. These models reveal a nanometer-thin complexion layer that encapsulates the crystalline grains. The distinct composition of this complexion constitutes a sizable electronic impedance. Rather than fulfilling macroscopic bulk measures of ionic and electronic conduction, LATP might thus gain the capability to suppress dendrite nucleation by sufficient local separation of charge carriers at the nanoscale.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000655739200001
DO  - DOI:10.1002/aenm.202100707
UR  - https://juser.fz-juelich.de/record/893834
ER  -