Abstract
The charge−discharge behaviors of natural graphite in propylene carbonate (PC):dimethyl carbonate (DMC) mixed solutions were investigated after a solid electrolyte interface (SEI) was formed in an ethylene carbonate (EC)-based electrolyte. Electrolytes consisting of LiClO4/PC and PC:DMC (1:1 by vol) caused a continuous decomposition of solvents, which led to the exfoliation of graphite. On the other hand, LiClO4/PC:DMC (1:7 by vol) showed successful charge−discharge curves without the exfoliation of graphite. These results indicate that the mixing ratio of PC:DMC plays an important role in suppression of the exfoliation of a graphite electrode. Raman spectra of the electrolytes show that the solvation numbers of PC molecules per lithium ion differ drastically in PC:DMC (1:1 by vol) and PC:DMC (1:7 by vol) due to the selective solvation of PC molecules. These results indicate that the solvation number of PC molecules per lithium ion is an important factor in determining the charge−discharge behavior of graphite in PC-based electrolyte.
Keywords
Propylene carbonateElectrolyteEthylene carbonateDimethyl carbonateSolvationGraphiteLithium (medication)Exfoliation jointChemistryInorganic chemistryIonMaterials sciencePhysical chemistryElectrodeOrganic chemistryGrapheneNanotechnologyMethanol
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Publication Info
- Year
- 2009
- Type
- article
- Volume
- 113
- Issue
- 20
- Pages
- 8948-8953
- Citations
- 97
- Access
- Closed
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Cite This
Yuki Yamada,
Yasuhiro KOYAMA,
Takeshi Abe
et al.
(2009).
Correlation between Charge−Discharge Behavior of Graphite and Solvation Structure of the Lithium Ion in Propylene Carbonate-Containing Electrolytes.
The Journal of Physical Chemistry C
, 113
(20)
, 8948-8953.
https://doi.org/10.1021/jp9022458
Identifiers
- DOI
- 10.1021/jp9022458