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

JOURNAL OF POWER SOURCES

卷:345

Article

Forestier, Coralie^1,2  Jankowski, Piotr^3,4  Wizner, Agnieszka^1,2  Davoisne, Carine^1,2  Gachot, Gregory^1,2  Sannier, Lucas⁵  Grugeon, Sylvie^1,2  Armand, Michel¹  Laruelle, Stephane^1,2,6 

[1] Univ Picardie Jules Verne, Lab Reactivite & Chim Solides, CNRS UMR 7314, 33 Rue St Leu, F-80039 Amiens, France

[2] CNRS RS2E FR3459, Reseau Stockage Electrochim Energie, Amiens, France

[3] Warsaw Univ Technol, Fac Chem, PL-00664 Warsaw, Poland

[4] Chalmers Univ Technol, Dept Appl Phys, SE-41296 Gothenburg, Sweden

[5] Renault, DEA IREB, Technoctr, 1 Ave Golf, F-78288 Guyancourt, France

[6] ALISTORE ERI European Res Inst, 33 Rue St Leu, F-80039 Amiens, France

关键词: Li-ion battery;    SEI;    Additives;    DFT;    Vinyl ethylene carbonate;    Dicyano ketene alkylene acetal;   

DOI  :  10.1016/j.jpowsour.2017.01.131

来源: Elsevier

【 摘 要 】

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+. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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