TY - JOUR
T1 - Chemical versus electrochemical electrolyte oxidation on NMC111, NMC622, NMC811, LNMO, and conductive carbon
AU - Jung, Roland
AU - Metzger, Michael
AU - Maglia, Filippo
AU - Stinner, Christoph
AU - Gasteiger, Hubert A.
N1 - Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/10/5
Y1 - 2017/10/5
N2 - We compare the stability of alkyl carbonate electrolyte on NMC111, -622, and -811, LNMO, and conductive carbon electrodes. We prove that CO2 and CO evolution onset potentials depend on the electrode material and increase in the order NMC811 < NMC111 ≈ NMC622 < conductive carbon ≈ LNMO, which we rationalize by two fundamentally different oxidation mechanisms, the chemical and the electrochemical electrolyte oxidation. Additionally, in contrast to the widespread understanding that transition metals in cathode active materials catalyze the electrolyte oxidation, we will prove that such a catalytic effect on the electrochemical electrolyte oxidation does not exist.
AB - We compare the stability of alkyl carbonate electrolyte on NMC111, -622, and -811, LNMO, and conductive carbon electrodes. We prove that CO2 and CO evolution onset potentials depend on the electrode material and increase in the order NMC811 < NMC111 ≈ NMC622 < conductive carbon ≈ LNMO, which we rationalize by two fundamentally different oxidation mechanisms, the chemical and the electrochemical electrolyte oxidation. Additionally, in contrast to the widespread understanding that transition metals in cathode active materials catalyze the electrolyte oxidation, we will prove that such a catalytic effect on the electrochemical electrolyte oxidation does not exist.
UR - http://www.scopus.com/inward/record.url?scp=85032640301&partnerID=8YFLogxK
U2 - 10.1021/acs.jpclett.7b01927
DO - 10.1021/acs.jpclett.7b01927
M3 - Article
C2 - 28910111
AN - SCOPUS:85032640301
SN - 1948-7185
VL - 8
SP - 4820
EP - 4825
JO - Journal of Physical Chemistry Letters
JF - Journal of Physical Chemistry Letters
IS - 19
ER -