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AuthorPetzl, Mathiasdc.contributor.author
Date of accession2016-03-15T10:40:55Zdc.date.accessioned
Available in OPARU since2016-03-15T10:40:55Zdc.date.available
Year of creation2015dc.date.created
AbstractThe dissertation is focused on the nondestructive detection and quantification of lithium plating in commercial lithium-ion batteries. Lithium plating denotes the deposition of metallic lithium on the negative graphite electrode of a lithium-ion battery during charging. This is a severe degradation process followed by capacity loss and impedance rise. Furthermore, the deposited lithium can grow dendritically which poses a serious safety hazard. It is shown that lithium plating can be detected by a new voltage plateau during the discharge step after charging the cell at low temperatures with high currents. Differential analysis of this plateau enables an estimation of the amount of plated lithium. Subsequent cell opening shows that the metallic lithium is deposited in a uniform and flat manner. The negative electrode is completely covered by the metallic lithium layer. Moreover, aging tests are performed at plating conditions, i.e. low temperatures and high charge currents. The capacity retention curves exhibit an inflection point which shows that lithium plating counteracts itself during long-term cycling. This is due to a loss of active lithium by irreversible plating and surface film formation. Thus, the capacity balance of the electrodes is shifted in a way that lithium plating is decreased.dc.description.abstract
Languagededc.language.iso
PublisherUniversität Ulmdc.publisher
LicenseStandard (ohne Print-On-Demand)dc.rights
Link to license texthttps://oparu.uni-ulm.de/xmlui/license_opod_v1dc.rights.uri
KeywordDendritenwachstumdc.subject
KeywordIn operandodc.subject
KeywordLithium-Ionen-Batteriedc.subject
KeywordZerstörungsfreie Analysedc.subject
Dewey Decimal GroupDDC 540 / Chemistry & allied sciencesdc.subject.ddc
LCSHDendritesdc.subject.lcsh
LCSHIon platingdc.subject.lcsh
LCSHLithium-ion-batteriesdc.subject.lcsh
TitleZerstörungsfreie Charakterisierung von Lithium-Plating in Lithium-Ionen-Batteriendc.title
Resource typeDissertationdc.type
DOIhttp://dx.doi.org/10.18725/OPARU-3343dc.identifier.doi
PPN836009339dc.identifier.ppn
URNhttp://nbn-resolving.de/urn:nbn:de:bsz:289-vts-97497dc.identifier.urn
GNDAlterungdc.subject.gnd
GNDLithiumdc.subject.gnd
GNDLithium-Ionen-Akkumulatordc.subject.gnd
GNDMetallabscheidungdc.subject.gnd
GNDZerstörungsfreie Werkstoffprüfungdc.subject.gnd
FacultyFakultät für Naturwissenschaftenuulm.affiliationGeneral
Date of activation2015-09-22T11:13:29Zuulm.freischaltungVTS
Peer reviewneinuulm.peerReview
Shelfmark print versionW: W-H 14.351uulm.shelfmark
DCMI TypeTextuulm.typeDCMI
VTS ID9749uulm.vtsID
CategoryPublikationenuulm.category
Bibliographyuulmuulm.bibliographie


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