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  X-ray Raman spectroscopy of lithium-ion battery electrolyte solutions in a flow cell.

Ketenoglu, D., Spiekermann, G., Harder, M., Oz, E., Koz, C., Yagci, M. C., et al. (2018). X-ray Raman spectroscopy of lithium-ion battery electrolyte solutions in a flow cell. Journal of Synchrotron Radiation, 25(2), 537-542. doi:10.1107/S1600577518001662.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-D5FC-4 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-D5FF-1
Genre: Journal Article

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 Creators:
Ketenoglu, D., Author
Spiekermann, G., Author
Harder, M., Author
Oz, E., Author
Koz, C., Author
Yagci, M. C., Author
Yilmaz, E., Author
Yin, Z.1, Author              
Sahle, C. J., Author
Detlefs, B., Author
Yavas, H., Author
Affiliations:
1Research Group of Structural Dynamics of (Bio)Chemical Systems, MPI for biophysical chemistry, Max Planck Society, 15915              

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Free keywords: non-resonant inelastic X-ray scattering; lithium-ion battery electrolyte; C and O K-edge spectra
 Abstract: 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.

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Language(s): eng - English
 Dates: 2018-02-212018-03
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: DOI: 10.1107/S1600577518001662
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Title: Journal of Synchrotron Radiation
Source Genre: Journal
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Pages: - Volume / Issue: 25 (2) Sequence Number: - Start / End Page: 537 - 542 Identifier: -