Lithium-cyclo-difluoromethane-1,1-bis(sulfonyl)imide as a stabilizing electrolyte additive for improved high voltage application of lithium-ion batteries

Murmann P, Streipert B, Klöpsch R, Ignatiev N, Sartori P, Winter M, Cekic-Laskovic I

Forschungsartikel (Zeitschrift) | Peer reviewed

Zusammenfassung

Lithium-cyclo-difluoromethane-1,1-bis(sulfonyl)imide (LiDMSI) was evaluated as an electrolyte additivein lithium-ion batteries for improved high voltage application. Cycling the cathode at high potentialsleads to an electrochemical oxidation of the salt to form a cathode electrolyte interphase (CEI) layer onthe cathode surface. With the addition of 2 wt.% of LiDMSI to the 1 M LiPF6 in EC:DEC 1:1 (by wt.)electrolyte, the capacity retention and the Coulombic efficiency in LiNi1/3Co1/3Mn1/3O2 / Li-half-cells aswell as LiNi1/3Co1/3Mn1/3O2 / graphite-full-cells was improved. The cycling results point at less overpotentialand resistance at the cathode/electrolyte interface. These improvements are studied by SEM,EIS as well as XPS techniques.

Details zur Publikation

FachzeitschriftPhysical Chemistry Chemical Physics (Phys. Chem. Chem. Phys.)
Jahrgang / Bandnr. / Volume17
Seitenbereich9352-9358
StatusVeröffentlicht
Veröffentlichungsjahr2015
Sprache, in der die Publikation verfasst istEnglisch

Autor*innen der Universität Münster

Murmann, Patrick
Münster Electrochemical Energy Technology Battery Research Center (MEET)
Schmuch, Richard
Münster Electrochemical Energy Technology Battery Research Center (MEET)
Streipert, Benjamin
Münster Electrochemical Energy Technology Battery Research Center (MEET)
Winter, Martin
Professur für Angewandte Materialwissenschaften zur Energiespeicherung und Energieumwandlung (Prof. Winter)
Münster Electrochemical Energy Technology Battery Research Center (MEET)