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Development of an evaluation tool for characterization of electrodes using Lasermicroscope imaging

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Development of an evaluation tool for characterization of electrodes using Lasermicroscope imaging

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dc.contributor.advisor Meinert, Lewerenz es_ES
dc.contributor.author Cabañero Martínez, David es_ES
dc.date.accessioned 2016-09-15T11:09:08Z
dc.date.available 2016-09-15T11:09:08Z
dc.date.created 2016-07
dc.date.issued 2016-09-15
dc.identifier.uri http://hdl.handle.net/10251/69739
dc.description.abstract Consulta en la Biblioteca ETSI Industriales (Riunet) es_ES
dc.description.abstract [EN] A series of graphite / lithiumironphosphate (LFP) commercial cells, aged under different conditions are disassembled and analyzed in order to identify ageing phenomena. The cells were aged under varying DOD and current rates for cycle ageing and varying temperatures and SOC for calendar ageing. The extracted positive and negative electrodes are studied using laser microscope images and Fourier Transform Infrared (FTIR) spectra in different parts of the disassembled cell. The results of the analysis exhibit uneven ageing of the graphite electrodes, showing differences over the electrode height between middle parts of the electrode compared to the upper or lower parts. The ageing optically detected by laser microscope is related to capacity fade and increase of internal resistance measured at life cycle test of the full cells. Evaluation of the images according to surface layer and dendritic formation show that there is a good correlation between them. Calendar aged cells show no evidence of ageing in laser microscope images even in the hardest measured conditions of 60 °C and 100% SOC. FTIR spectrometer provides information about the possible ageing compounds in the electrodes. Some SEI components could be detected and other ones derived from electrolyte decomposition. Cathode and separator measurements show good signal spectra but anode spectra shows low peak signal and some variability between the measurements. Only one cell has been evaluated by FTIR spectrometer to show the proof of concept of this techniques. es_ES
dc.language Inglés es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Consulta en la Biblioteca ETSI Industriales es_ES
dc.subject Herramientas de evaluación es_ES
dc.subject Caracterización de electrodos es_ES
dc.subject Microscopio laser es_ES
dc.subject.classification TECNOLOGIA ELECTRONICA es_ES
dc.subject.other Ingeniero Industrial-Enginyer Industrial es_ES
dc.title Development of an evaluation tool for characterization of electrodes using Lasermicroscope imaging es_ES
dc.type Proyecto/Trabajo fin de carrera/grado es_ES
dc.rights.accessRights Cerrado es_ES
dc.contributor.affiliation Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros Industriales - Escola Tècnica Superior d'Enginyers Industrials es_ES
dc.description.bibliographicCitation Cabañero Martínez, D. (2016). Development of an evaluation tool for characterization of electrodes using Lasermicroscope imaging. http://hdl.handle.net/10251/69739. es_ES
dc.description.accrualMethod Archivo delegado es_ES


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