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dc.contributor.authorWagner, Nils Peter
dc.contributor.authorAsheim, Karina
dc.contributor.authorVullum-Bruer, Fride
dc.contributor.authorSvensson, Ann Mari
dc.date.accessioned2020-01-13T10:10:53Z
dc.date.available2020-01-13T10:10:53Z
dc.date.created2019-07-31T09:05:15Z
dc.date.issued2019
dc.identifier.citationJournal of Power Sources. 2019, 437 1-10.nb_NO
dc.identifier.issn0378-7753
dc.identifier.urihttp://hdl.handle.net/11250/2635902
dc.description.abstractThe influence of the lithium inventory on the performance and degradation mechanism of NCA||Si cells operating at a third of the theoretical silicon capacity is analysed. The lithium inventory was increased by electrochemical prelithiation to a value of 300 mAhg−1(Si). Full-cells were cycled at harsh conditions with a cut-off of 4.4 V to maximise the capacity. The higher lithium inventory resulted in an increased reversible capacity from 163 to 199 mAhg−1(NCA). The cycle-life was increased by 60% and reached 245 cycles. Three-electrode and post-mortem analyses revealed that the main reason for capacity fade is repeated SEI repair, consuming the lithium inventory. Differential capacity analysis revealed different degradation of silicon anodes cycled in half-cells compared to full-cells. No shifts in the alloying/dealloying peaks are present in full-cell geometry while changes are observed in half-cell geometry. This is expected to be caused by a limited alloying capacity in the full-cell and lithium consumption during cycling, alleviating material stresses. We conclude that the lithium consumption is the main factor causing capacity fade in NCA||Si cells. The decreasing degree of lithiation over cycling due to the lithium consumption is likely to be the reason for the absence of structural degradations of full-cell cycled silicon.nb_NO
dc.language.isoengnb_NO
dc.publisherElseviernb_NO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.titlePerformance and failure analysis of full cell lithium ion battery with LiNi0.8Co0.15Al0.05O2 and silicon electrodesnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.source.pagenumber1-10nb_NO
dc.source.volume437nb_NO
dc.source.journalJournal of Power Sourcesnb_NO
dc.identifier.doi10.1016/j.jpowsour.2019.226884
dc.identifier.cristin1713363
dc.relation.projectNorges forskningsråd: 255195nb_NO
dc.description.localcode2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).nb_NO
cristin.unitcode194,66,35,0
cristin.unitnameInstitutt for materialteknologi
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal