TY - JOUR
T1 - Generation of cathode passivation films via oxidation of lithium bis(oxalato) borate on high voltage spinel (LiNi0.5Mn 1.5O4)
AU - Xu, Mengqing
AU - Tsiouvaras, Nikolaos
AU - Garsuch, Arnd
AU - Gasteiger, Hubert A.
AU - Lucht, Brett L.
PY - 2014/4/10
Y1 - 2014/4/10
N2 - The reactions of lithium ion battery electrolyte (LiPF6 in ethylene carbonate/ethyl methyl, EC/EMC, 3:7 v/v) with and without added lithium bis(oxalato) borate (LiBOB) on the surface of high voltage LiNi 0.5Mn1.5O4 cathodes has been investigated via a combination of electrochemical measurements, in situ gas analysis, and ex situ surface analysis. The oxidation of LiBOB on the cathode results in the generation of CO2 and a cathode passivation film containing borate oxalates. The cathode passivation film inhibits oxidation of the bulk electrolyte at high potential (>4.8 V vs Li/Li+).
AB - The reactions of lithium ion battery electrolyte (LiPF6 in ethylene carbonate/ethyl methyl, EC/EMC, 3:7 v/v) with and without added lithium bis(oxalato) borate (LiBOB) on the surface of high voltage LiNi 0.5Mn1.5O4 cathodes has been investigated via a combination of electrochemical measurements, in situ gas analysis, and ex situ surface analysis. The oxidation of LiBOB on the cathode results in the generation of CO2 and a cathode passivation film containing borate oxalates. The cathode passivation film inhibits oxidation of the bulk electrolyte at high potential (>4.8 V vs Li/Li+).
UR - http://www.scopus.com/inward/record.url?scp=84898434290&partnerID=8YFLogxK
U2 - 10.1021/jp501970j
DO - 10.1021/jp501970j
M3 - Article
AN - SCOPUS:84898434290
SN - 1932-7447
VL - 118
SP - 7363
EP - 7368
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 14
ER -
