title: Lithium-cyclo-difluoromethane-1,1-bis(sulfonyl)imide as a stabilizing electrolyte additive for improved high voltage applications in lithium-ion batteries.
abstract: Lithium-cyclo-difluoromethane-1,1-bis(sulfonyl)imide (LiDMSI) was evaluated as an electrolyte additive in lithium-ion batteries for improved high voltage applications. Cycling the cathode at high potentials leads to the electrochemical oxidation of the salt to form a cathode electrolyte interphase (CEI) layer on the cathode surface. With the addition of 2 wt% of LiDMSI to the 1 M LiPF6 in 1 : 1 (by wt) EC : DEC electrolyte, the capacity retention and the Coulombic efficiency in LiNi1/3Co1/3Mn1/3O2/Li-half-cells as well as in LiNi1/3Co1/3Mn1/3O2/graphite-full-cells were improved. The cycling results point out the less over-potential and resistance at the cathode/electrolyte interface. These improvements are studied by SEM, EIS and XPS techniques.
authors.affiliation: Westfälische Wilhelms-Universität Münster, Institute of Physical Chemistry, MEET Battery Research Center, Corrensstr. 46, 48149 Muenster, Germany. Patrick.Murmann@uni-muenster.de Martin.Winter@uni-muenster.de.
authors.forename: Patrick
authors.initials: P
authors.lastname: Murmann
authors.forename: Benjamin
authors.initials: B
authors.lastname: Streipert
authors.forename: Richard
authors.initials: R
authors.lastname: Kloepsch
authors.forename: Nikolai
authors.initials: N
authors.lastname: Ignatiev
authors.forename: Peter
authors.initials: P
authors.lastname: Sartori
authors.forename: Martin
authors.initials: M
authors.lastname: Winter
authors.forename: Isidora
authors.initials: I
authors.lastname: Cekic-Laskovic