title: Ion chromatography electrospray ionization mass spectrometry method development and investigation of lithium hexafluorophosphate-based organic electrolytes and their thermal decomposition products.
abstract: A method based on the coupling of ion chromatography (IC) and electrospray ionization mass spectrometry (ESI-MS) for the separation and determination of thermal decomposition products of LiPF6-based organic electrolytes is presented. The utilized electrolytes, LP30 and LP50, are commercially available and consist of 1mol/l LiPF6 dissolved in ethylene carbonate/dimethyl carbonate and ethylene carbonate/ethyl methyl carbonate, respectively. For the separation method development three ion chromatographic columns with different capacity and stationary phase were used and compared. Besides the known hydrolysis products of lithium hexafluorophosphate, several new organophosphates were separated and identified with the developed IC-ESI-MS method during aging investigations of the electrolytes. The chemical structures were elucidated with IC-ESI-MS/MS.
authors.affiliation: University of Münster, MEET Battery Research Center, Institute of Physical Chemistry, Corrensstraße 46, 48149 Münster, Germany.
authors.forename: Vadim
authors.initials: V
authors.lastname: Kraft
authors.affiliation: University of Münster, MEET Battery Research Center, Institute of Physical Chemistry, Corrensstraße 46, 48149 Münster, Germany.
authors.forename: Martin
authors.initials: M
authors.lastname: Grützke
authors.affiliation: University of Münster, MEET Battery Research Center, Institute of Physical Chemistry, Corrensstraße 46, 48149 Münster, Germany.
authors.forename: Waldemar
authors.initials: W
authors.lastname: Weber
authors.affiliation: University of Münster, MEET Battery Research Center, Institute of Physical Chemistry, Corrensstraße 46, 48149 Münster, Germany.
authors.forename: Martin
authors.initials: M
authors.lastname: Winter
authors.affiliation: University of Münster, MEET Battery Research Center, Institute of Physical Chemistry, Corrensstraße 46, 48149 Münster, Germany. Electronic address: sascha.nowak@uni-muenster.de.
authors.forename: Sascha
authors.initials: S
authors.lastname: Nowak
mesh_terms: D004573:Electrolytes / Q000737:chemistry*; D008094:Lithium / Q000737:chemistry*; D010756:Phosphoric Acids / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D053719:Tandem Mass Spectrometry / Q000379:methods*; D013696:Temperature; D013814:Thermal Conductivity; D013997:Time Factors
chemical_list: D004573:Electrolytes; D010756:Phosphoric Acids; D008094:Lithium
keywords: Fluorinated organophosphates; IC/ESI-MS; Lithium hexafluorophoshate