TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Hall, Florian
A1  - Wußler, Sabine
A1  - Buqa, Hilmi
A1  - Bessler, Wolfgang G.
T1  - Asymmetry of Discharge/Charge Curves of Lithium-Ion Battery Intercalation Electrodes
JF  - The Journal of Physical Chemistry C
N2  - Nickel cobalt aluminum oxide (NCA) based lithium-ion battery electrodes exhibit a distinct asymmetry in discharge/charge behavior towards high bulk stoichiometry (low state of charge). We show that basic electrochemical relationships, that is, the Nernst equation and the Butler-Volmer equation, are able to reproduce this behavior when a two-step reaction mechanism is assumed. The two-step mechanism consists of (1) lithium-ion adsorption from the electrolyte onto the active material particle surface under electron transfer, and (2) intercalation of surface-adsorbed lithium atoms into the bulk material. The asymmetry of experimental half-cell data of an NCA electrode cycled at 0.1 C-rate can be quantitatively reproduced with this simple model. The model parameters show two alternative solutions, predicting either a saturated (highly-covered) or a depleted surface for high bulk lithiation.
KW  - Lithium-Ionen-Akkumulator
KW  - Aufladung
Y1  - 2016
SN  - 1932-7455 (Online)
SS  - 1932-7455 (Online)
SN  - 1932-7447 (Print)
SS  - 1932-7447 (Print)
U6  - https://doi.org/10.1021/acs.jpcc.6b07949
DO  - https://doi.org/10.1021/acs.jpcc.6b07949
VL  - 120
IS  - 41
SP  - 23407
EP  - 23414
ER  -