气候变化领域集成服务门户(CCPortal): Unsymmetrical fluorinated malonatoborate as an amphoteric additive for high-energy-density lithium-ion batteries

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DOI	10.1039/c8ee00372f
	Unsymmetrical fluorinated malonatoborate as an amphoteric additive for high-energy-density lithium-ion batteries
	Han J.-G.; Lee J.B.; Cha A.; Lee T.K.; Cho W.; Chae S.; Kang S.J.; Kwak S.K.; Cho J.; Hong S.Y.; Choi N.-S.
发表日期	2018
ISSN	17545692
起始页码	1552
结束页码	1562
卷号	11 期号:6
英文摘要	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. © 2018 The Royal Society of Chemistry.
英文关键词	Additives; Anodes; Cathodes; Solid electrolytes; Coulombic efficiency; Electrolyte additives; Fluoroethylene carbonates; Graphite composites; High energy densities; High-Capacity Electrodes; Solid electrolyte interphase; Structural instability; Lithium-ion batteries; additive; borate; carbonate; composite; Coulomb criterion; electrode; electrolyte; fluorine; fuel cell; graphite; lithium; transformation; volume change
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190219
作者单位	Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan, 44919, South Korea
推荐引用方式 GB/T 7714	Han J.-G.,Lee J.B.,Cha A.,et al. Unsymmetrical fluorinated malonatoborate as an amphoteric additive for high-energy-density lithium-ion batteries[J],2018,11(6).
APA	Han J.-G..,Lee J.B..,Cha A..,Lee T.K..,Cho W..,...&Choi N.-S..(2018).Unsymmetrical fluorinated malonatoborate as an amphoteric additive for high-energy-density lithium-ion batteries.Energy & Environmental Science,11(6).
MLA	Han J.-G.,et al."Unsymmetrical fluorinated malonatoborate as an amphoteric additive for high-energy-density lithium-ion batteries".Energy & Environmental Science 11.6(2018).