Electronic structures and electrochemical properties of LiPF6−n(CF3)n
| Autor: | Takaaki Sonoda, N. V. Pavlenko, Hideo Nagashima, Hideo Sakata, Yurii L. Yagupolskii, Akira Kawakami, Haruki Kamizori, Fusaji Kita |
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| Rok vydání: | 2001 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Chemistry Organic solvent Inorganic chemistry Analytical chemistry Lithium compound Energy Engineering and Power Technology Electrolyte Conductivity Electrochemistry Ionic conductivity Thermal stability Electrical and Electronic Engineering Physical and Theoretical Chemistry |
| Zdroj: | Journal of Power Sources. :581-583 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/s0378-7753(01)00695-4 |
| Popis: | We evaluated (1) thermal and electrochemical stability and (2) ion-dissociation ability of PF 6-n (CF 3 ) n anions by computational method. The thermal stability order by ΔΔE (anion) is PF 4 (CF 3 ) - 2 > PF 5 (CF 3 ) > PF 3 (CF 3 ) - 3 > PF - 6 . The ion-dissociation ability order by ΔΔE (Li salts) is LiPF 3 (CF 3 ) 3 > LiPF 4 (CF 3 ) 2 > LiPF 5 (CF 3 ) > LiPF 6 . The conductivity of electrolyte solution with LiPF 4 (CF 3 ) 2 (3.9 mS/cm) was a little lower than that of LiPF 6 (4.4 mS/cm) in 0.1 mol/l Li salt/PC:DME electrolyte, while the oxidation potential of LiPF 4 (CF 3 ) 2 in PC was higher than that of LiPF 6 . The LiPF 4 (CF 3 ) 2 -cell showed better cycle characteristics than LiPF 6 -cell. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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