ChemElectroChem · 2018 · 32 citations · 29 references
Natural SciencesChemical EngineeringMaterials ScienceElectrochemical EngineeringElectrochemistryMaterials ChemistryBattery MaterialsBattery TestingCathode MaterialsElectrochemical CellsElectrochemical Energy StorageElectrode MaterialsCathode Active MaterialsElectrochemical MeasurementsElectrochemical Stability WindowElectrochemical WindowLithium Iron PhosphateLithium-ion Battery Cathode MaterialsLithium-ion Battery MaterialsOxidation - Reduction Potential
Abstract The ionic liquid 1‐ethyl‐3‐methylimidazolium bis(trifluoromethylsulfonyl)imide was used in the scanning micropipette contact method to extend the electrochemical window of the electrolyte solution and enable the study of lithium‐ion battery materials with higher oxidation potential. Localized electrochemical measurements were performed on lithium iron phosphate particles that were drop‐cast onto a glassy carbon substrate. Investigation of the active materials occurred on a small scale (ca. 10 μm diameter), defined by the area of meniscus contact between the electrolyte solution in the micropipette and the substrate. Our studies showed that the SMCM probe is stable and can be used to analyze high energy lithium‐ion battery materials in the range of 2.5 to 5.1 V vs. Li/Li + .
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