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Hong, Sung You
Synthetic Organic Chemistry Laboratory
Research Interests
  • Synthetic organic chemistry, transition metals, oxidation state

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Dual-function ethyl 4,4,4-trifluorobutyrate additive for high-performance Ni-rich cathodes and stable graphite anodes

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dc.contributor.author Kim, Koeun ko
dc.contributor.author Kim, Yeonkyoung ko
dc.contributor.author Park, Sewon ko
dc.contributor.author Yang, Hyun Ji ko
dc.contributor.author Park, Sung Ji ko
dc.contributor.author Shin, Kyomin ko
dc.contributor.author Woo, Jung-Je ko
dc.contributor.author Kim, Saheum ko
dc.contributor.author Hong, Sung You ko
dc.contributor.author Choi, Nam-Soon ko
dc.date.available 2018-07-26T09:01:02Z -
dc.date.created 2018-07-17 ko
dc.date.issued 2018-08 ko
dc.identifier.citation JOURNAL OF POWER SOURCES, v.396, pp.276 - 287 ko
dc.identifier.issn 0378-7753 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/24418 -
dc.description.abstract An ethyl 4,4,4-trifluorobutyrate (ETFB) additive, with ester and partially fluorinated alkyl moieties, is employed to stabilize the interface structure of Ni-rich layered LiNi0.7Co0.15Mn0.15O2 (NCM) cathodes and graphite anodes. The analysis of the surface chemistry of the electrodes shows that ETFB serves as a Afunctional additive for constructing protective layers on both electrodes in a full cell. Cycling tests reveal that the addition of 1% ETFB leads to excellent capacity retention (84.8%) for the NCM/graphite full cell, which also delivers a superior discharge capacity of 167 mAh g(-1) and a high Coulombic efficiency of over 99.8% after 300 cycles at 45 degrees C. The ETFB-derived protective layer effectively reduces intergranular cracking in secondary NCM cathode particles upon repeated charge-discharge cycling and limits the dissolution of transition metal ions from the cathode at high temperatures. In addition, after ETFB reduction, the graphite anode develops a thermally stable interface structure, which suppresses the self-discharge of graphite coupled with the NCM cathode at 60 degrees C. ko
dc.language 영어 ko
dc.publisher ELSEVIER SCIENCE BV ko
dc.title Dual-function ethyl 4,4,4-trifluorobutyrate additive for high-performance Ni-rich cathodes and stable graphite anodes ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85048390487 ko
dc.identifier.wosid 000440876700032 ko
dc.type.rims ART ko
dc.identifier.doi 10.1016/j.jpowsour.2018.06.046 ko
dc.identifier.url https://www.sciencedirect.com/science/article/pii/S0378775318306426 ko
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