dc.contributor.author | Wagner, Nils Peter | |
dc.contributor.author | Asheim, Karina | |
dc.contributor.author | Vullum-Bruer, Fride | |
dc.contributor.author | Svensson, Ann Mari | |
dc.date.accessioned | 2020-01-13T10:10:53Z | |
dc.date.available | 2020-01-13T10:10:53Z | |
dc.date.created | 2019-07-31T09:05:15Z | |
dc.date.issued | 2019 | |
dc.identifier.citation | Journal of Power Sources. 2019, 437 1-10. | nb_NO |
dc.identifier.issn | 0378-7753 | |
dc.identifier.uri | http://hdl.handle.net/11250/2635902 | |
dc.description.abstract | The 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.iso | eng | nb_NO |
dc.publisher | Elsevier | nb_NO |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no | * |
dc.title | Performance and failure analysis of full cell lithium ion battery with LiNi0.8Co0.15Al0.05O2 and silicon electrodes | nb_NO |
dc.type | Journal article | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.description.version | publishedVersion | nb_NO |
dc.source.pagenumber | 1-10 | nb_NO |
dc.source.volume | 437 | nb_NO |
dc.source.journal | Journal of Power Sources | nb_NO |
dc.identifier.doi | 10.1016/j.jpowsour.2019.226884 | |
dc.identifier.cristin | 1713363 | |
dc.relation.project | Norges forskningsråd: 255195 | nb_NO |
dc.description.localcode | 2019 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.unitcode | 194,66,35,0 | |
cristin.unitname | Institutt for materialteknologi | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |