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XPS study on the STOBA coverage on Li(Ni 0.4 Co 0.2 Mn 0.4 )O 2 oxide in pristine electrodes
Author(s) -
Chang LiShin,
Wu HungChun,
Lin YiChun,
Su ChingYi,
Pan JingPin
Publication year - 2017
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.6267
Subject(s) - x ray photoelectron spectroscopy , electrode , cathode , lithium (medication) , scanning electron microscope , oxide , lithium fluoride , materials science , metal , fluoride , layer (electronics) , ion , analytical chemistry (journal) , chemistry , chemical engineering , nanotechnology , inorganic chemistry , metallurgy , organic chemistry , endocrinology , medicine , engineering , composite material
The additive of self‐terminated oligomers with hyper‐branched architecture (STOBA) in Li(Ni 0.4 Co 0.2 Mn 0.4 )O 2 (LNCM) cathodes of lithium ion batteries improves the battery stability and capacity. In this study, the surface chemistry of pristine LNCM electrodes with and without the STOBA additive was analyzed by means of X‐ray photoelectron spectroscopy and the surface morphology was observed by scanning electron microscopy. It was found that STOBA covers LNCM particles uniformly and the formation of chemical bonding between nitrogen atoms in STOBA and metallic atoms in LNCM was discovered. This bonding may cause the uniform coverage of STOBA on LNCM. The formation of STOBA layer on LNCM improves the coverage of the binder poly(vinylidene fluoride) and inhibits the formation of LiF.