Pregledni rad
https://doi.org/10.5599/jese.734
Advances in understanding Li battery mechanisms using impedance spectroscopy
Jože Moškon
; Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
Sara Drvarič Talian
; Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
Robert Dominko
orcid.org/0000-0002-6673-4459
; Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
Miran Gaberšček
orcid.org/0000-0002-8104-1693
; Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
Sažetak
The use of impedance spectroscopy in the field of modern batteries is demonstrated on three systems: lithium ion batteries represented by lithium iron phosphate (LFP) and lithium cobalt oxide (LCO) electrodes, a porous carbon cathode in contact with polysulfides and a metallic lithium anode exhibiting dendritic growth. In all cases, systematic experiments are shown where the type and composition of electrochemical cell is varied in order to identify the main processes contributing to the impedance response. The experiments are upgraded
with appropriate models, using mainly the transmission line approach. The approach allows establishment of clear correlations between the composition and morphology of electrodes on one hand and the measured impedance features on the other. As the transmission line
models are based on the use of physically well-defined elements, the approach allows a quantitative description of the main processes (diffusion, reaction, migration across films and contacts) taking place in modern battery electrodes.
Ključne riječi
Lithium ion batteries; lithium sulfur batteries; transmission line model; porous electrode model; dendrites diffusion; electrochemical reaction
Hrčak ID:
235489
URI
Datum izdavanja:
10.3.2020.
Posjeta: 1.272 *