F-doped Li1.15Ni0.275Ru0.575O2 cathode materials with long cycle life and improved rate performance
DC Field | Value | Language |
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dc.contributor.author | Choi, S. | - |
dc.contributor.author | Kim, M.-C. | - |
dc.contributor.author | Moon, S.-H. | - |
dc.contributor.author | Kim, H. | - |
dc.contributor.author | Park, K.-W. | - |
dc.date.available | 2019-10-16T07:40:01Z | - |
dc.date.created | 2019-10-16 | - |
dc.date.issued | 2019-12 | - |
dc.identifier.issn | 0013-4686 | - |
dc.identifier.uri | http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/35201 | - |
dc.description.abstract | In this study, Li1.15Ni0.275Ru0.575O2 cathode material for lithium-ion batteries is synthesized using a facile solid-state reaction. In particular, the Li1.15Ni0.275Ru0.575O2 cathode material with a layered structure, despite its high initial capacity, deteriorates in both stability and rate performance. In order to overcome the drawbacks, F-doped Li1.15Ni0.275Ru0.575O2 cathode structures (LNROF-x, 0 < x < 0.1) are prepared with varying contents of F as a dopant and characterized. For the F-doped Li1.15Ni0.275Ru0.575O2 samples, if the O2− sites in the structure are replaced by F−, the transition metal ions of Ni2+ and Ru4+ can be partially reduced to Ni+ and Ru3+ with larger ionic radii for charge compensation. Thus, the increased interspace between the transition metal ions caused by their reduction increases the lattice parameter in the F-doped Li1.15Ni0.275Ru0.575O2 structure. Compared to the undoped Li1.15Ni0.275Ru0.575O2, the improved electrochemical properties, i.e., long life cycle and rate performance, of the F-doped Li1.15Ni0.275Ru0.575O2 samples can result from the improved structural stability caused by a stronger bond of metal-F than that of metal-O and an increased Li+-ion diffusion motion caused by an increased Li slab distance. Furthermore, the Li+-ion diffusion coefficients for the samples are measured by cyclic voltammetry and galvanostatic intermittent titration. However, with increasing F-doping amount, the diffusion coefficients for LNROF-0.02, LNROF-0.04, and LNROF-0.06 increase, whereas the diffusion coefficient for LNROF-0.08 with the excessive F-doping decreases because of the increased resistance to Li+ ion motion caused by the Li/Ni anti-site defect. Thus, the amount of F as a dopant in the F-doped Li1.15Ni0.275Ru0.575O2 samples for the LIBs needs to be optimized. © 2019 Elsevier Ltd | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | Elsevier Ltd | - |
dc.relation.isPartOf | Electrochimica Acta | - |
dc.title | F-doped Li1.15Ni0.275Ru0.575O2 cathode materials with long cycle life and improved rate performance | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.electacta.2019.135015 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | Electrochimica Acta, v.326, pp.135015 | - |
dc.description.journalClass | 1 | - |
dc.identifier.wosid | 000491886800024 | - |
dc.identifier.scopusid | 2-s2.0-85073017240 | - |
dc.citation.startPage | 135015 | - |
dc.citation.title | Electrochimica Acta | - |
dc.citation.volume | 326 | - |
dc.contributor.affiliatedAuthor | Park, K.-W. | - |
dc.type.docType | Article | - |
dc.description.isOpenAccess | N | - |
dc.subject.keywordAuthor | Anion doping | - |
dc.subject.keywordAuthor | Cathode | - |
dc.subject.keywordAuthor | F substitution | - |
dc.subject.keywordAuthor | Layered structure | - |
dc.subject.keywordAuthor | Li-ion batteries | - |
dc.subject.keywordPlus | Cyclic voltammetry | - |
dc.subject.keywordPlus | Diffusion | - |
dc.subject.keywordPlus | Life cycle | - |
dc.subject.keywordPlus | Lithium-ion batteries | - |
dc.subject.keywordPlus | Metal ions | - |
dc.subject.keywordPlus | Solid state reactions | - |
dc.subject.keywordPlus | Solid-State Batteries | - |
dc.subject.keywordPlus | Stability | - |
dc.subject.keywordPlus | Transition metal compounds | - |
dc.subject.keywordPlus | Transition metals | - |
dc.subject.keywordPlus | Anion doping | - |
dc.subject.keywordPlus | Cath-ode materials | - |
dc.subject.keywordPlus | Cathode structure | - |
dc.subject.keywordPlus | Charge compensation | - |
dc.subject.keywordPlus | Galvanostatic intermittent titration | - |
dc.subject.keywordPlus | Ion diffusion coefficient | - |
dc.subject.keywordPlus | Layered Structures | - |
dc.subject.keywordPlus | Structural stabilities | - |
dc.subject.keywordPlus | Cathodes | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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