TY  - CONF
A1  - Sander, Luise
T1  - Links Between Electrode Properties and  Cell Performance in Commercial  Sodium-Ion Batteries
N2  - Our latest results of commercially purchased cylindrical sodium ion battery (SIB) cells will be presented. Two different cell types were dissasembled and thouroughly characterized on electrode as well as on material level.
Both cell types comprise aluminum current collectors for anode and cathode, respectively. Furthermore, geometric electrode parameters, such as electrode size, thickness and loading, will be presented and linked to the electrical data-sheet values. Further in-depth characterization on material level revealed that both cathode active materials are composed of a cobalt free Ni-Mn-Fe-oxide. Interestingly, the cathode particles significantly differ in shape and size between the two cell types. Both anode active materials are graphite-free, and the particle structure points in both cases to a biomass-derived hard carbon material. Based on gas chromatography mesaurements coupled with mass spectrometry (GC-MS), both cell types utilize a mixture of carbonates as electrolyte, however, contain different conductive salts. Moreover, the measured, characteristic electrical features, e.g., capacity, Coulombic efficiency, and initial cycle life, will be discussed. Intriguingly, the cycling stability greatly differs between the cell types. Presumably, this behaviour can be mainly linked to the different morphology of the cathode active material.
Overall, the work can give important insights in the composition and electrical behabiour of currently available SIB-cells.
T2  - Sodium Battery Symposium (SBS-6)
CY  - Dresden, Germany
DA  - 03.09.2025
KW  - Battery
KW  - Sodium-Ion-Battery
KW  - Electrochemical Energy Storage
KW  - Energy Storage
PY  - 2025
AN  - OPUS4-64411
LA  - eng
AD  - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER  -