TY  - JOUR
A1  - Ketenoglu, Didem
A1  - Spiekermann, Georg
A1  - Harder, Manuel
A1  - Oz, Erdinc
A1  - Koz, Cevriye
A1  - Yagci, Mehmet C.
A1  - Yilmaz, Eda
A1  - Yin, Zhong
A1  - Sahle, Christoph J.
A1  - Detlefs, Blanka
A1  - Yavas, Hasan
T1  - X-ray Raman spectroscopy of lithium-ion battery electrolyte solutions in a flow cell
JF  - Journal of synchrotron radiation
N2  - The 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.
KW  - non-resonant inelastic X-ray scattering
KW  - lithium-ion battery electrolyte
KW  - C and O K-edge spectra
Y1  - 2018
U6  - https://doi.org/10.1107/S1600577518001662
SN  - 0909-0495
SN  - 1600-5775
VL  - 25
SP  - 537
EP  - 542
PB  - International Union of Crystallography
CY  - Chester
ER  -