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A sealed optical cell for the study of lithium-electrode|electrolyte interfaces
journal contribution
posted on 2003-03-12, 00:00 authored by Patrick HowlettPatrick Howlett, D R MacFarlane, A F HollenkampA sealed, symmetrical, lithium optical cell, which enables optical images of lithium surface deposits and in situ Raman spectra to be obtained simply and conveniently during charge-discharge cycling of lithium metal electrodes, has been designed and tested. A conventional aprotic liquid, 1M lithium hexafluorophosphate in propylene carbonate, and an experimental ionic liquid, 20 mol% lithium bis(trifluoromethanesulfonyl)amide in 1-ethyl 3-methyl imidazolium bis(trifluoromethanesulfonyl)amide, are investigated as electrolyte solutions. Images obtained from the cell with the former electrolyte solution demonstrate the problems associated with cycling lithium metal electrodes. Images obtained with the latter electrolyte solution provide clear evidence that continued investigation of ionic liquids for use with lithium metal electrodes is warranted. Operation of the cell with the conventional electrolyte yields Raman spectra of good quality. The spectra display vibrational modes which arise from the electrolyte, as well as several additional modes which are associated with the deposits formed during cycling.
History
Journal
Journal of power sourcesVolume
114Issue
2Pagination
277 - 284Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0378-7753eISSN
1873-2755Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2002, ElsevierUsage metrics
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No categories selectedKeywords
batteryoptical imagesRaman spectralithium metal electrodeionic liquidsdendritesScience & TechnologyPhysical SciencesTechnologyChemistry, PhysicalElectrochemistryEnergy & FuelsMaterials Science, MultidisciplinaryChemistryMaterials ScienceGAMMA-BUTYROLACTONE SOLUTIONSENHANCED RAMAN-SCATTERINGTEMPERATURE MOLTEN-SALTSPOLYMER ELECTROLYTESORGANIC ELECTROLYTEIN-SITUDENDRITE FORMATIONGEL ELECTROLYTESFILM FORMATION
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