期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 87, 期 -, 页码 27-30出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2017.12.012
关键词
Lithium dendrite; Coulombic efficiency; Lithium bis(fluorosulfonyl)imide; 1,3-Dioxolane; Electrolyte
资金
- National Science Foundation of China [61471317]
We propose a novel binary electrolyte of lithium bis(fluorosulfonyl)imide/1,3-dioxolane, that exhibits excellent performance for the suppression of lithium-dendrite growth and stability against lithium metal. With 2.5 M lithium bis(fluorosulfonyl) imide in 1,3-dioxolane, long short-circuit onset-times of 72.3 and > 190 h are observed in Li/Li cells polarized at galvanostatic current densities of 1.0 and 0.5 mA cm(-2), respectively. The coulombic efficiencies for the repeated Li plating/stripping in the 2.5 M electrolyte at 1.0 and 0.5 mA cm(-2) are as high as 99.0% and 99.5%, respectively. The electrolyte structure is changed with an increase in the concentration speculated from Raman spectra, which enables the reactivity toward lithium metal to be lowered.
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