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

Sewon Park, Seo Yeong Jeong, Tae Kyung Lee, Min Woo Park, Hyeong Yong Lim, Jaekyung Sung, Jaephil Cho, Sang Kyu Kwak (), Sung You Hong () and Nam-Soon Choi ()
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Sewon Park: Ulsan National Institute of Science and Technology (UNIST)
Seo Yeong Jeong: Ulsan National Institute of Science and Technology (UNIST)
Tae Kyung Lee: Ulsan National Institute of Science and Technology (UNIST)
Min Woo Park: Ulsan National Institute of Science and Technology (UNIST)
Hyeong Yong Lim: Ulsan National Institute of Science and Technology (UNIST)
Jaekyung Sung: Ulsan National Institute of Science and Technology (UNIST)
Jaephil Cho: Ulsan National Institute of Science and Technology (UNIST)
Sang Kyu Kwak: Ulsan National Institute of Science and Technology (UNIST)
Sung You Hong: Ulsan National Institute of Science and Technology (UNIST)
Nam-Soon Choi: Ulsan National Institute of Science and Technology (UNIST)

Nature Communications, 2021, vol. 12, issue 1, 1-12

Abstract: 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).

Date: 2021
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DOI: 10.1038/s41467-021-21106-6

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