dc.date.accessioned | 2021-03-19T21:22:54Z | |
dc.date.available | 2021-03-19T21:22:54Z | |
dc.date.created | 2021-02-01T17:20:48Z | |
dc.date.issued | 2020 | |
dc.identifier.citation | Hu, Yang Miikkulainen, Ville Mizohata, Kenichiro Norby, Truls Eivind Nilsen, Ola Fjellvåg, Helmer . Ionic conductivity in LixTaOy thin films grown by Atomic Layer Deposition (ALD). Electrochimica Acta. 2020, 361, 137019 | |
dc.identifier.uri | http://hdl.handle.net/10852/84177 | |
dc.description.abstract | The material system Li-Ta-O is a promising candidate for thin-film solid-state electrolytes in Li-ion batteries. In the present study, we have varied the Li content x in LixTaOy thin films grown by atomic layer deposition (ALD) with the aim of improving the Li-ion conductivity. The amorphous films were grown at 225 °C on insulating sapphire and on conductive Ti substrates using tantalum ethoxide (Ta(OEt)5), lithium tert-butoxide (LiOtBu) and water as reactants. The film composition was determined by time-of-flight elastic recoil detection analysis (TOF-ERDA), displaying an almost linear relationship between the pulsed and deposited Li content. The ionic conductivities were determined by in-plane and cross-plane AC measurements, exhibiting an Arrhenius-type behaviour and comparatively weak thickness-dependence. Increasing Li content x from 0.32 to 0.98 increases the film conductivity by two orders of magnitude while higher Li content x = 1.73 results in decreased conductivity. A room-temperature conductivity σRT of ~10−8 S cm−1 is obtained for a 169 nm thick Li0.98TaOy film. The evolution of conductivity and activation energy suggests a competing effect between the concentration and the mobility of mobile Li ions when more Li are incorporated. The compositional dependence of Li transport mechanism is discussed. | |
dc.language | EN | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 International | |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | |
dc.title | Ionic conductivity in LixTaOy thin films grown by Atomic Layer Deposition (ALD) | |
dc.type | Journal article | |
dc.creator.author | Hu, Yang | |
dc.creator.author | Miikkulainen, Ville | |
dc.creator.author | Mizohata, Kenichiro | |
dc.creator.author | Norby, Truls Eivind | |
dc.creator.author | Nilsen, Ola | |
dc.creator.author | Fjellvåg, Helmer | |
cristin.unitcode | 185,15,12,0 | |
cristin.unitname | Kjemisk institutt | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |
dc.identifier.cristin | 1885422 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Electrochimica Acta&rft.volume=361&rft.spage=137019&rft.date=2020 | |
dc.identifier.jtitle | Electrochimica Acta | |
dc.identifier.volume | 361 | |
dc.identifier.doi | https://doi.org/10.1016/j.electacta.2020.137019 | |
dc.identifier.urn | URN:NBN:no-87011 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 0013-4686 | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/84177/2/1-s2.0-S0013468620314122-main.pdf | |
dc.type.version | PublishedVersion | |
cristin.articleid | 137019 | |
dc.relation.project | NFR/197411 | |
dc.relation.project | NFR/200030 | |
dc.relation.project | NFR/220135 | |