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

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Replacing conventional battery electrolyte additives with dioxolone derivatives for high-energy-density lithium-ion batteries

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Title
Replacing conventional battery electrolyte additives with dioxolone derivatives for high-energy-density lithium-ion batteries
Author
Park, SewonJeong, Seo YeongLee, Tae KyungPark, Min WooLim, Hyeong YongSung, JaekyungCho, JaephilKwak, Sang KyuHong, Sung YouChoi, Nam-Soon
Issue Date
2021-02
Publisher
NATURE RESEARCH
Citation
NATURE COMMUNICATIONS, v.12, pp.838
Abstract
Solid electrolyte interphases generated using electrolyte additives are key for anode-electrolyte interactions and for enhancing the lithium-ion battery lifespan. Classical solid electrolyte interphase additives, such as vinylene carbonate and fluoroethylene carbonate, have limited potential for simultaneously achieving a long lifespan and fast chargeability in high-energy-density lithium-ion batteries (LIBs). Here we report a next-generation synthetic additive approach that allows to form a highly stable electrode-electrolyte interface architecture from fluorinated and silylated electrolyte additives; it endures the lithiation-induced volume expansion of Si-embedded anodes and provides ion channels for facile Li-ion transport while protecting the Ni-rich LiNi0.8Co0.1Mn0.1O2 cathodes. The retrosynthetically designed solid electrolyte interphase-forming additives, 5-methyl-4-((trifluoromethoxy)methyl)-1,3-dioxol-2-one and 5-methyl-4-((trimethylsilyloxy)methyl)-1,3-dioxol-2-one, provide spatial flexibility to the vinylene carbonate-derived solid electrolyte interphase via polymeric propagation with the vinyl group of vinylene carbonate. The interface architecture from the synthesized vinylene carbonate-type additive enables high-energy-density LIBs with 81.5% capacity retention after 400 cycles at 1 C and fast charging capability (1.9% capacity fading after 100 cycles at 3 C).
URI
https://scholarworks.unist.ac.kr/handle/201301/49989
URL
https://www.nature.com/articles/s41467-021-21106-6
DOI
10.1038/s41467-021-21106-6
ISSN
2041-1723
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