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Electrochemical performance of tin-based nano-composite electrodes using a vinylene carbonate-containing electrolyte for Li-ion cells

Kilibarda, G.; Schlabach, S.; Winkler, V.; Bruns, M.; Hanemann, T.; Szabo, D.V.

Abstract:
Tin represents a promising material to increase the specific capacity compared to the state of the art graphite anodes in lithium ion cells. The aim of this work is to explain the electrochemical behavior of tin based hydrocarbon nanoparticulate composite electrodes, synthesized by means of a microwave plasma technique without any binder or slurry process. A comprehensive electrochemical character ization shows that adding vinylene carbonate (VC) to the electrolyte improves the electrochemical performance. Electrochemical impedance spectroscopy (EIS) and post mortem investigations of the cycled electrode material by X ray photoelectron spectroscopy (XPS) reveal the formation of a polymeric SEI during the first cycles, being responsible for the improvement. The differential capacity plots of the discharging process show that the lithium richest phase (Li22Sn5) is formed during electrochemical loading. A comprehensive characterization with specially designed electrochemical tests finally dem onstrates the decrease of capacity with increasing temperature. This is due to intensified mechanical stresses and a fresh SEI formation. Due to destruction of the electrode material degradation is also observed with increasing current density. ... mehr

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Postprint §
DOI: 10.5445/IR/110096754
Veröffentlicht am 07.03.2019
Originalveröffentlichung
DOI: 10.1016/j.jpowsour.2014.04.030
Scopus
Zitationen: 9
Web of Science
Zitationen: 10
Coverbild
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Werkstoffprozesstechnik (IAM-WPT)
Institut für Angewandte Materialien - Energiespeichersysteme (IAM-ESS)
Karlsruhe Nano Micro Facility (KNMF)
Publikationstyp Zeitschriftenaufsatz
Jahr 2014
Sprache Englisch
Identifikator ISSN: 0378-7753, 1873-2755
urn:nbn:de:swb:90-AAA1100967546
KITopen-ID: 110096754
HGF-Programm 43.15.02 (POF II, LK 01)
Erschienen in Journal of power sources
Band 263
Heft October
Seiten 145-153
Schlagworte Li-ion cell, Sn nanocomposite electrode, Temperature, Current density, Vinylene carbonate (VC), SEI-formation
Nachgewiesen in Web of Science
Scopus
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