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


Unsymmetrical fluorinated malonatoborate as an amphoteric additive for high-energy-density lithium- ion batteries

DC Field Value Language Han, Jung-Gu ko Lee, Jae Bin ko Cha, Aming ko Lee, Tae Kyung ko Cho, Woongrae ko Chae, Sujong ko Kang, Seok Ju ko Kwak, Sang Kyu ko Cho, Jaephil ko Hong, Sung You ko Choi, Nam-Soon ko 2018-05-04T00:47:16Z - 2018-04-18 ko 2018-06 ko
dc.identifier.citation ENERGY & ENVIRONMENTAL SCIENCE, v.11, no.6, pp.1552 - 1562 ko
dc.identifier.issn 1754-5692 ko
dc.identifier.uri -
dc.description.abstract High-capacity Si-embedded anodes and Li-rich cathodes are considered key compartments for post lithium-ion batteries with high energy densities. However, the significant volume changes of Si and the irreversible phase transformation of Li-rich cathodes prevent their practical application. Here we report lithium fluoromalonato(difluoro)borate (LiFMDFB) as an unusual dual-function additive to resolve these structural instability issues of the electrodes. This molecularly engineered borate additive protects the Li-rich cathode by generating a stable cathode electrolyte interphase (CEI) while simultaneously tuning the fluoroethylene carbonate (FEC)-oriented solid electrolyte interphase (SEI) on the Si-graphite composite (SGC) anode. The complementary electrolyte design utilizing both LiFMDFB and FEC exhibited an improved capacity retention of 85%, a high Coulombic efficiency of ∼99.5%, and an excellent energy density of ∼400 W h kg−1 in Li-rich/SGC full cells at a practical mass loading after 100 cycles. This dual-function additive approach offers a way to develop electrolyte additives to build a more favorable SEI for high-capacity electrodes. ko
dc.language 영어 ko
dc.publisher ROYAL SOC CHEMISTRY ko
dc.title Unsymmetrical fluorinated malonatoborate as an amphoteric additive for high-energy-density lithium- ion batteries ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85048975539 ko
dc.identifier.wosid 000435351000017 ko
dc.type.rims ART ko
dc.identifier.doi 10.1039/C8EE00372F ko
dc.identifier.url!divAbstract ko
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