Lithium dendrite suppression and cycling efficiency of lithium anode

被引：40

作者：

Zhang, Peng ^{[1
]}

Zhu, Jiajia ^{[1
]}

Wang, Miao ^{[1
]}

Imanishi, Nobuyuki ^{[2
]}

Yamamoto, Osamu ^{[2
]}

机构：

[1] Zhejiang Univ, Dept Phys, Hangzhou 310027, Zhejiang, Peoples R China

[2] Mie Univ, Grad Sch Engn, Tsu, Mie 5148507, Japan

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2018年 / 87卷

基金：

美国国家科学基金会;

关键词：

Lithium dendrite; Coulombic efficiency; Lithium bis(fluorosulfonyl)imide; 1,3-Dioxolane; Electrolyte; SOLID-ELECTROLYTE INTERPHASE; SOLVENTS;

D O I：

10.1016/j.elecom.2017.12.012

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

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.

引用

页码：27 / 30

页数：4

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