EQCM study of oxygen cathodes in DMSO LiPF6 electrolyte
The oxygen reduction reaction (ORR) in DMSO containing LiPF6 has been studied with the electrochemical quartz crystal microbalance (EQCM) during galvanostatic cathodic and anodic pulses, chronoamperometry and cyclic voltammetry experiments. We disclose here for the first time gravimetric evidence wi...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_15726657_v765_n_p45_Torres |
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todo:paper_15726657_v765_n_p45_Torres2023-10-03T16:27:33Z EQCM study of oxygen cathodes in DMSO LiPF6 electrolyte Torres, W.R. Cantoni, L. Tesio, A.Y. Del Pozo, M. Calvo, E.J. Battery DMSO EQCM Lithium Oxygen Chronoamperometry Cyclic voltammetry Electrolytes Electrolytic reduction Lithium Oxygen Quartz crystal microbalances Battery DMSO Electrochemical quartz crystal microbalance EQCM High current densities Low current density Mechanistic models Oxygen reduction reaction Deposition The oxygen reduction reaction (ORR) in DMSO containing LiPF6 has been studied with the electrochemical quartz crystal microbalance (EQCM) during galvanostatic cathodic and anodic pulses, chronoamperometry and cyclic voltammetry experiments. We disclose here for the first time gravimetric evidence with the EQCM of the different mechanistic models that apply to the ORR in LiPF6/DMSO electrolyte: (i) Surface electrochemical/chemical deposition of Li2O2(s) and (ii) solution phase disproportion of LiO2(soln) yields large Li2O2 particles. The mass per electron detected with the EQCM depends on the respective current rates and thus on the mechanisms, i.e. 23 g/F for the formation of Li2O2 thin film at high current density and much larger values for low current density due to solvent co-deposition and further degradation. © 2015 Elsevier B.V. All rights reserved. Fil:Calvo, E.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_15726657_v765_n_p45_Torres |
| institution |
Universidad de Buenos Aires |
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I-28 |
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R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Battery DMSO EQCM Lithium Oxygen Chronoamperometry Cyclic voltammetry Electrolytes Electrolytic reduction Lithium Oxygen Quartz crystal microbalances Battery DMSO Electrochemical quartz crystal microbalance EQCM High current densities Low current density Mechanistic models Oxygen reduction reaction Deposition |
| spellingShingle |
Battery DMSO EQCM Lithium Oxygen Chronoamperometry Cyclic voltammetry Electrolytes Electrolytic reduction Lithium Oxygen Quartz crystal microbalances Battery DMSO Electrochemical quartz crystal microbalance EQCM High current densities Low current density Mechanistic models Oxygen reduction reaction Deposition Torres, W.R. Cantoni, L. Tesio, A.Y. Del Pozo, M. Calvo, E.J. EQCM study of oxygen cathodes in DMSO LiPF6 electrolyte |
| topic_facet |
Battery DMSO EQCM Lithium Oxygen Chronoamperometry Cyclic voltammetry Electrolytes Electrolytic reduction Lithium Oxygen Quartz crystal microbalances Battery DMSO Electrochemical quartz crystal microbalance EQCM High current densities Low current density Mechanistic models Oxygen reduction reaction Deposition |
| description |
The oxygen reduction reaction (ORR) in DMSO containing LiPF6 has been studied with the electrochemical quartz crystal microbalance (EQCM) during galvanostatic cathodic and anodic pulses, chronoamperometry and cyclic voltammetry experiments. We disclose here for the first time gravimetric evidence with the EQCM of the different mechanistic models that apply to the ORR in LiPF6/DMSO electrolyte: (i) Surface electrochemical/chemical deposition of Li2O2(s) and (ii) solution phase disproportion of LiO2(soln) yields large Li2O2 particles. The mass per electron detected with the EQCM depends on the respective current rates and thus on the mechanisms, i.e. 23 g/F for the formation of Li2O2 thin film at high current density and much larger values for low current density due to solvent co-deposition and further degradation. © 2015 Elsevier B.V. All rights reserved. |
| format |
JOUR |
| author |
Torres, W.R. Cantoni, L. Tesio, A.Y. Del Pozo, M. Calvo, E.J. |
| author_facet |
Torres, W.R. Cantoni, L. Tesio, A.Y. Del Pozo, M. Calvo, E.J. |
| author_sort |
Torres, W.R. |
| title |
EQCM study of oxygen cathodes in DMSO LiPF6 electrolyte |
| title_short |
EQCM study of oxygen cathodes in DMSO LiPF6 electrolyte |
| title_full |
EQCM study of oxygen cathodes in DMSO LiPF6 electrolyte |
| title_fullStr |
EQCM study of oxygen cathodes in DMSO LiPF6 electrolyte |
| title_full_unstemmed |
EQCM study of oxygen cathodes in DMSO LiPF6 electrolyte |
| title_sort |
eqcm study of oxygen cathodes in dmso lipf6 electrolyte |
| url |
http://hdl.handle.net/20.500.12110/paper_15726657_v765_n_p45_Torres |
| work_keys_str_mv |
AT torreswr eqcmstudyofoxygencathodesindmsolipf6electrolyte AT cantonil eqcmstudyofoxygencathodesindmsolipf6electrolyte AT tesioay eqcmstudyofoxygencathodesindmsolipf6electrolyte AT delpozom eqcmstudyofoxygencathodesindmsolipf6electrolyte AT calvoej eqcmstudyofoxygencathodesindmsolipf6electrolyte |
| _version_ |
1807317721610715136 |