Ketenoglu, D.Spiekermann, G.Harder, M.Oz, E.Koz, C.Yagci, M. C.Yilmaz, E.Yin, Z.Sahle, C. J.Detlefs, B.Yavaş, H.2019-02-212019-02-2120180909-0495http://hdl.handle.net/11693/50156The effects of varying LiPF6 salt concentration and the presence of lithium bis(oxalate)borate additive on the electronic structure of commonly used lithium-ion battery electrolyte solvents (ethylene carbonate-dimethyl carbonate and propylene carbonate) have been investigated. X-ray Raman scattering spectroscopy (a non-resonant inelastic X-ray scattering method) was utilized together with a closed-circle flow cell. Carbon and oxygen K-edges provide characteristic information on the electronic structure of the electrolyte solutions, which are sensitive to local chemistry. Higher Li+ ion concentration in the solvent manifests itself as a blue-shift of both the π∗ feature in the carbon edge and the carbonyl π∗ feature in the oxygen edge. While these oxygen K-edge results agree with previous soft X-ray absorption studies on LiBF4 salt concentration in propylene carbonate, carbon K-edge spectra reveal a shift in energy, which can be explained with differing ionic conductivities of the electrolyte solutions.Electronic structures of commonly used lithium-ion battery electrolyte solutions measured by non-resonant inelastic X-ray scattering method are presented.EnglishC and O K-edge spectraLithium-ion battery electrolyteNon-resonant inelastic X-ray scatteringArticle10.1107/S1600577518001662