Generation of cathode passivation films via oxidation of lithium bis(oxalato) borate on high voltage spinel (LiNi0.5Mn 1.5O4)
Date of Original Version
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+). © 2014 American Chemical Society.
Journal of Physical Chemistry C
Xu, Mengqing, Nikolaos Tsiouvaras, Arnd Garsuch, Hubert A. Gasteiger, and Brett L. Lucht. "Generation of cathode passivation films via oxidation of lithium bis(oxalato) borate on high voltage spinel (LiNi0.5Mn 1.5O4)." Journal of Physical Chemistry C 118, 14 (2014): 7363-7368. doi:10.1021/jp501970j.