dc.contributor.author | Gunnarshaug, Astrid Fagertun | |
dc.contributor.author | Burheim, Odne Stokke | |
dc.contributor.author | Kjelstrup, Signe | |
dc.date.accessioned | 2024-01-18T07:52:44Z | |
dc.date.available | 2024-01-18T07:52:44Z | |
dc.date.created | 2023-06-30T11:34:31Z | |
dc.date.issued | 2023 | |
dc.identifier.citation | Electrochimica Acta. 2023, 462 142739-142749. | en_US |
dc.identifier.issn | 0013-4686 | |
dc.identifier.uri | https://hdl.handle.net/11250/3112341 | |
dc.description.abstract | We 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.iso | eng | en_US |
dc.publisher | Elsevier | en_US |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Reversible heat effects of lithium metal- and porous lithium iron phosphate electrodes | en_US |
dc.title.alternative | Reversible heat effects of lithium metal- and porous lithium iron phosphate electrodes | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.source.pagenumber | 142739-142749 | en_US |
dc.source.volume | 462 | en_US |
dc.source.journal | Electrochimica Acta | en_US |
dc.identifier.doi | 10.1016/j.electacta.2023.142739 | |
dc.identifier.cristin | 2159806 | |
dc.relation.project | Norges forskningsråd: 262644 | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |