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Comparative investigation of solid electrolyte interphases created by the electrolyte additives vinyl ethylene carbonate and dicyano ketene vinyl ethylene acetal

Coralie Forestier ; Piotr Jankowski (Institutionen för fysik, Kondenserade materiens fysik (Chalmers)) ; A Wizner ; Carine Davoisne ; Gregroy Gachot ; Lucas Sannier ; Sylvie Grugeon ; Patrik Johansson (Institutionen för fysik, Kondenserade materiens fysik (Chalmers)) ; Michel Armand ; Stephane Laruelle
Journal of Power Sources (0378-7753). Vol. 345 (2017), p. 212-220.
[Artikel, refereegranskad vetenskaplig]

The effect of the replacement of the carbonyl oxygen in VEC additive by =C(CN)(2) in the analogous dicyano ketene vinyl ethylene acetal (DCKVEA) on the electrochemical reduction profile is significant. Yet, the additives were proven, through IR spectroscopy supported by DFT computations, by applying EELS techniques and performing synthesis of a reduction product, to reduce in a similar way. Interestingly, the reduction-induced capacities were found to be quite different and can be explained either by the different properties of the SEI, from lithium carbonate and its malononitrile homologue, or by the different abilities of the two additives to solvate Li+.

Nyckelord: Li-ion battery, SEI, Additives, DFT, Vinyl ethylene carbonate, Dicyano ketene alkylene acetal



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Denna post skapades 2017-02-14. Senast ändrad 2017-04-28.
CPL Pubid: 248129

 

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