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Träfflista för sökning "WFRF:(Zhuang J.) srt2:(2000-2004)"

Search: WFRF:(Zhuang J.) > (2000-2004)

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  • Augustsson, Andreas, et al. (author)
  • Solid electrolyte interphase on graphite Li-ion battery anodes studied by soft X-ray spectroscopy
  • 2004
  • In: Phys. Chem. Chem. Phys. ; 6, s. 4185-4189
  • Journal article (peer-reviewed)abstract
    • We have measured X-ray absorption and emission near the C Is edge of graphite electrodes cycled in lithium-ion battery cells. Resonantly excited emission spectra of graphite electrodes exhibit features characteristic of both highly oriented pyrolytic graphite as well as polycrystalline graphite. Spectra of three electrodes cycled in two different electrolytes are presented and compared with spectra of the pristine electrode. A solid electrolyte interphase(SEI) was detected on the electrochemically cycled electrodes. By the use of selective excitation, resonant X-ray emission spectra of the SEI-species were obtained and compared to spectra of reference compounds. The SEI on the cycled graphite anode was shown to comprise lithium oxalate (Li2C2O4), lithium succinate (LiO2CCH2CH2CO2Li) and lithium methoxide (LiOCH3).
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3.
  • Guo, J. H., et al. (author)
  • The molecular structure of alcohol-water mixtures determined by soft-X-ray absorption and emission spectroscopy
  • 2004
  • In: Journal of Electron Spectroscopy and Related Phenomena. - : Elsevier BV. - 0368-2048 .- 1873-2526. ; 137-40:SI, s. 425-428
  • Journal article (peer-reviewed)abstract
    • We have examined the influence of the intermolecular interaction on the local electronic structure by using X-ray absorption and emission spectra of liquid methanol, water, and their mixtures (in molar ratios of 9:1 and 7:3). We find a strong involvement of hydrogen bonding in the mixing of water and methanol molecules. The local electronic structure of water and methanol clusters, where water cluster is bridging within a 6-member open-ring structured methanol cluster, is separately determined. The experimental findings suggest an incomplete mixing of water-alcohol systems and a strong self- association between methanol chain and water cluster through hydrogen bonding. The enhancement of joint water-methanol open-ring structure owes the explanation to the loss of entropy of the aqueous solutions.
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