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dc.contributor.authorGunnarshaug, Astrid Fagertun
dc.contributor.authorBurheim, Odne Stokke
dc.contributor.authorKjelstrup, Signe
dc.date.accessioned2024-01-18T07:52:44Z
dc.date.available2024-01-18T07:52:44Z
dc.date.created2023-06-30T11:34:31Z
dc.date.issued2023
dc.identifier.citationElectrochimica Acta. 2023, 462 142739-142749.en_US
dc.identifier.issn0013-4686
dc.identifier.urihttps://hdl.handle.net/11250/3112341
dc.description.abstractWe report Peltier heats and reaction entropy of cells with lithium metal- and near fully lithiated lithium iron phosphate (LFP) electrodes. The Peltier heats were measured through the Seebeck coefficient of thermogalvanic cells. The value obtained for the Peltier heat of Li-metal, -32 ± 3 kJ/mol at 298 K, supports previously reported values. When close to being fully lithiated, LFP goes through a phase transition from a two-phase mixture to a solid solution. The value of Peltier heats obtained for LFP vary from -15 ± 1 to -72 ± 9 kJ/mol. The variation is explained by large entropy changes of lithium iron phosphate, near the phase transition. The cell entropy difference of lithium iron phosphate against lithium metal varied from -64 ± 3 to +50 ± 20 J/K mol. The negative Peltier heats means that the electrodes generates heat when acting as an anode, which leads to a temperature rise in the electrode compartment, and absorbs heat when acting as a cathode. The local reversible heat effect is equal to or larger in magnitude than the net reversible heat effect. The time-dependence of the Seebeck coefficient, the Soret effect, was found to differ between the cells with planar Li-metal electrodes to porous LFP.en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleReversible heat effects of lithium metal- and porous lithium iron phosphate electrodesen_US
dc.title.alternativeReversible heat effects of lithium metal- and porous lithium iron phosphate electrodesen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.source.pagenumber142739-142749en_US
dc.source.volume462en_US
dc.source.journalElectrochimica Actaen_US
dc.identifier.doi10.1016/j.electacta.2023.142739
dc.identifier.cristin2159806
dc.relation.projectNorges forskningsråd: 262644en_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2


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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal