DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, Yongju | ko |
dc.contributor.author | Shin, Jaewook | ko |
dc.contributor.author | Kang, Hyeonmuk | ko |
dc.contributor.author | Lee, Daehee | ko |
dc.contributor.author | Kim, Tae-Hee | ko |
dc.contributor.author | Kwon, Young-Kyun | ko |
dc.contributor.author | Cho, Eun Ae | ko |
dc.date.accessioned | 2021-05-26T00:10:07Z | - |
dc.date.available | 2021-05-26T00:10:07Z | - |
dc.date.created | 2021-05-25 | - |
dc.date.created | 2021-05-25 | - |
dc.date.created | 2021-05-25 | - |
dc.date.created | 2021-05-25 | - |
dc.date.created | 2021-05-25 | - |
dc.date.issued | 2021-03 | - |
dc.identifier.citation | ADVANCED SCIENCE, v.8, no.6 | - |
dc.identifier.issn | 2198-3844 | - |
dc.identifier.uri | http://hdl.handle.net/10203/285355 | - |
dc.description.abstract | Li-excess layered cathode (LLC) materials have a high theoretical specific capacity of 250 mAh g(-1) induced by transition metal (cationic) and oxygen (anionic) redox activity. Especially, the oxygen redox reaction related to the activation of the Li2MnO3 domain plays the crucial role of providing a high specific capacity. However, it also induces an irreversible oxygen release and accelerates the layered-to-spinel phase transformation and capacity fading. Here, it is shown that surface doping of vanadium (V5+) cations into LLC material suppresses both the irreversible oxygen release and undesirable phase transformation, resulting in the improvement of capacity retention. The V-doped LLC shows a high discharge capacity of 244.3 +/- 0.8 mAh g(-1) with 92% retention after 100 cycles, whereas LLC delivers 233.6 +/- 1.1 mAh g(-1) with 74% retention. Furthermore, the average discharge voltage of V-doped LLC drops by only 0.33 V after 100 cycles, while LLC exhibits 0.43 V of average discharge voltage drop. Experimental and theoretical investigations indicate that doped V-doping increase the transition metal-oxygen (TM-O) covalency and affect the oxidation state of peroxo-like (O-2)(n-) species during the delithiation process. The role of V-doping to make the oxygen redox reversible in LLC materials for high-energy density Li-ion batteries is illustrated here. | - |
dc.language | English | - |
dc.publisher | WILEY | - |
dc.title | Promoting the Reversible Oxygen Redox Reaction of Li-Excess Layered Cathode Materials with Surface Vanadium Cation Doping | - |
dc.type | Article | - |
dc.identifier.wosid | 000612806600001 | - |
dc.identifier.scopusid | 2-s2.0-85099918249 | - |
dc.type.rims | ART | - |
dc.citation.volume | 8 | - |
dc.citation.issue | 6 | - |
dc.citation.publicationname | ADVANCED SCIENCE | - |
dc.identifier.doi | 10.1002/advs.202003013 | - |
dc.contributor.localauthor | Cho, Eun Ae | - |
dc.contributor.nonIdAuthor | Lee, Yongju | - |
dc.contributor.nonIdAuthor | Shin, Jaewook | - |
dc.contributor.nonIdAuthor | Lee, Daehee | - |
dc.contributor.nonIdAuthor | Kim, Tae-Hee | - |
dc.contributor.nonIdAuthor | Kwon, Young-Kyun | - |
dc.description.isOpenAccess | Y | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | cation doping | - |
dc.subject.keywordAuthor | density functional theory calculation | - |
dc.subject.keywordAuthor | Li-excess cathode | - |
dc.subject.keywordAuthor | lithium-ion batteries | - |
dc.subject.keywordAuthor | oxygen redox reaction | - |
dc.subject.keywordPlus | LITHIUM-ION BATTERIES | - |
dc.subject.keywordPlus | IRREVERSIBLE CAPACITY LOSS | - |
dc.subject.keywordPlus | ANIONIC REDOX | - |
dc.subject.keywordPlus | COMPOSITE CATHODES | - |
dc.subject.keywordPlus | PLANE-WAVE | - |
dc.subject.keywordPlus | OXIDE | - |
dc.subject.keywordPlus | MN | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | ELECTRODES | - |
dc.subject.keywordPlus | PARTICIPATION | - |
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