Ketenoglu, DidemSpiekermann, GeorgHarder, ManuelOz, ErdincKoz, CevriyeYagci, Mehmet C.Yilmaz, Eda2024-08-042024-08-0420180909-04951600-5775https://doi.org/10.1107/S1600577518001662https://hdl.handle.net/11616/98175The 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 pi* feature in the carbon edge and the carbonyl pi* 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.eninfo:eu-repo/semantics/openAccessnon-resonant inelastic X-ray scatteringlithium-ion battery electrolyteC and O K-edge spectraArticle255375422948893410.1107/S16005775180016622-s2.0-85042711748Q1WOS:000426315400029Q2