Journalartikel

Jahr der Veröffentlichung: 2017

Seiten: 2228-2233

Zeitschrift: ACS Energy Letters

Bandnummer: 2

Heftnummer: 10

ISSN: 2380-8195

DOI Link: https://doi.org/10.1021/acsenergylett.7b00619

Verlag: American Chemical Society

Abstract: 
The use of functionalized electrolytes is effective in mitigating the poor cycling stability of silicon (Si), which has long hindered the implementation of this promising high-capacity anode material in next-generation lithium-ion batteries. In this Letter, we present a comparative study of gaseous byproducts formed by decomposition of fluoroethylene carbonate (FEC)-containing and FEC-free electrolytes using differential electrochemical mass spectrometry and infrared spectroscopy, combined with long-term cycling data of half-cells (Si vs Li). The evolving gaseous species depend strongly on the type of electrolyte; the main products for the FEC-based electrolyte are H-2 and CO2, while the FEC-free electrolyte shows predominantly H-2, C2H4, and CO. The characteristic shape of the evolution patterns suggests different reactivities of the various LixSi alloys, depending on the cell potential. The data acquired for long-term cycling confirm the benefit of using FEC as cosolvent in the electrolyte.

Harvard-Zitierstil: Schiele, A., Breitung, B., Hatsukade, T., Berkes, B., Hartmann, P., Janek, J., et al. (2017) The Critical Role of Fluoroethylene Carbonate in the Gassing of Silicon Anodes for Lithium-Ion Batteries, ACS Energy Letters, 2(10), pp. 2228-2233. https://doi.org/10.1021/acsenergylett.7b00619

APA-Zitierstil: Schiele, A., Breitung, B., Hatsukade, T., Berkes, B., Hartmann, P., Janek, J., & Brezesinski, T. (2017). The Critical Role of Fluoroethylene Carbonate in the Gassing of Silicon Anodes for Lithium-Ion Batteries. ACS Energy Letters. 2(10), 2228-2233. https://doi.org/10.1021/acsenergylett.7b00619