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In Situ Electrochemical Zn2+-Doping for Mn-Rich Layered Oxides in Li-Ion Batteries
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Choi, Aram | - |
dc.contributor.author | Lim, Jungwoo | - |
dc.contributor.author | Kim, Hanseul | - |
dc.contributor.author | Doo, Sung Wook | - |
dc.contributor.author | Lee, Kyu Tae | - |
dc.date.accessioned | 2021-01-31T08:09:25Z | - |
dc.date.available | 2021-01-31T08:09:25Z | - |
dc.date.created | 2019-12-04 | - |
dc.date.created | 2019-12-04 | - |
dc.date.issued | 2019-05 | - |
dc.identifier.citation | ACS Applied Energy Materials, Vol.2 No.5, pp.3427-3434 | - |
dc.identifier.issn | 2574-0962 | - |
dc.identifier.other | 87682 | - |
dc.identifier.uri | https://hdl.handle.net/10371/171854 | - |
dc.description.abstract | Mn-rich layered oxide materials have been considered as promising cathode materials for large scale Li-ion batteries because Mn is more inexpensive than Co and Ni. In this connection, a variety of doped-materials have been examined to improve the electrochemical performance of Mn-rich cathode materials. Doped-materials are conventionally synthesized using solid state synthesis at high temperatures, where most dopants are located at transition metal sites. The amount of redox-active transition metals decreases with increasing the amount of dopants in transition metals sites, resulting in the reduced reversible capacity of doped-materials. This paper demonstrates an in situ electrochemical doping of Zn2+ that is site-selective. Li+ at Li sites in Mn-rich layered oxides is selectively replaced by Zn2+ during cycling. Zn2+ ions in electrolytes are irreversibly inserted to Li sites in delithiated Mn-rich cathode materials during discharge, leading to the formation of Zn2+-doped Mn-rich layered oxides, [Li1-xZny] [Mn1-xMz]O-2 (M = Ni and Co). In contrast to conventional doped-materials, Zn2+ dopants at Li sites do not reduce the reversible capacity of Mn-rich oxide materials. Zn2+ at the Li sites diminishes both cation disorder and electrolyte decomposition during cycling, leading to the improved capacity retention over 100 cycles. In addition, the Zn2+ intercalation is dependent on the amount of Mn in layered oxides and, thereby, only available for Mn-rich cathode materials. Moreover, the in situ electrochemical Zn2+-doping is facile and practical in the aspect of processability, because this only requires an electrolyte additive, such as Zn(TFSI)(2). | - |
dc.language | 영어 | - |
dc.publisher | American Chemical Society | - |
dc.title | In Situ Electrochemical Zn2+-Doping for Mn-Rich Layered Oxides in Li-Ion Batteries | - |
dc.type | Article | - |
dc.contributor.AlternativeAuthor | 이규태 | - |
dc.identifier.doi | 10.1021/acsaem.9b00241 | - |
dc.citation.journaltitle | ACS Applied Energy Materials | - |
dc.identifier.wosid | 000469885300050 | - |
dc.identifier.scopusid | 2-s2.0-85065789647 | - |
dc.citation.endpage | 3434 | - |
dc.citation.number | 5 | - |
dc.citation.startpage | 3427 | - |
dc.citation.volume | 2 | - |
dc.identifier.sci | 000469885300050 | - |
dc.description.isOpenAccess | N | - |
dc.contributor.affiliatedAuthor | Lee, Kyu Tae | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.subject.keywordPlus | POSITIVE ELECTRODE MATERIALS | - |
dc.subject.keywordPlus | VOLTAGE DECAY | - |
dc.subject.keywordPlus | LITHIUM | - |
dc.subject.keywordPlus | CAPACITY | - |
dc.subject.keywordPlus | CATHODES | - |
dc.subject.keywordPlus | CHEMISTRY | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordAuthor | electrochemical doping | - |
dc.subject.keywordAuthor | lithium ion battery | - |
dc.subject.keywordAuthor | Mn-rich layered oxide | - |
dc.subject.keywordAuthor | cathode | - |
dc.subject.keywordAuthor | zinc doping | - |
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