TY  - JOUR
AU  - Thienenkamp, Johannes H.
AU  - Lennartz, Peter
AU  - Winter, Martin
AU  - Brunklaus, Gunther
TI  - Experimental correlation of anionic mass transport and lithium dendrite growth in solid-state polymer-based lithium metal batteries
JO  - Cell reports / Physical science
VL  - 5
IS  - 12
SN  - 2666-3864
CY  - [New York, NY]
PB  - Elsevier
M1  - FZJ-2025-00351
SP  - 102340 - 102352
PY  - 2024
AB  - Various metal deposition models have been proposed for alkali metal batteries, but the experimental acces-sibility of designated driving forces and characteristics of specific morphologies is still limited. A combinedmethod portfolio comprising operando 1D 19 F MRI, in situ 7 Li NMR, and dynamic electrochemical impedancespectroscopy (EIS) experiments is presented. Experimental evidence of the relation of capacity-degradingdendritic Li metal growth and anionic mass-transport quantities beyond Sand’s time in polymer-based Limetal batteries is demonstrated. Comparison of anionic mass transport and morphological changes in Limetal in Li||Li and NMC 622||Li cells revealed that elevated anion drift velocities within electrolytes are corre-lated with pronounced dendrite growth. Higher cell voltages are associated with increased anion drift veloc-ities and hence dendrite growth, as reflected by a 2.5-fold increase in velocities in NMC 622||Li compared to Li||Li cells. This highlights the potential of the introduced method portfolio for experimental evaluation of poly-mer electrolytes and artificial coatings suitable for alkali metal batteries
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001391642100001
DO  - DOI:10.1016/j.xcrp.2024.102340
UR  - https://juser.fz-juelich.de/record/1035293
ER  -