Enabling reliable lithium metal batteries by a bifunctional anionic electrolyte additive

被引：145

作者：

Ma, Yulin ^{[1
,2
]}

Zhou, Zhenxin ^{[1
,2
]}

Li, Changjin ^{[1
,2
]}

Wang, Long ^{[1
,2
]}

Wang, Yang ^{[1
,2
]}

Cheng, Xinqun ^{[1
,2
]}

Zuo, Pengjian ^{[1
,2
]}

Du, Chunyu ^{[1
,2
]}

Huo, Hua ^{[1
,2
]}

Gao, Yunzhi ^{[1
,2
]}

Yin, Geping ^{[1
,2
]}

机构：

[1] Harbin Inst Technol, MIIT Key Lab Crit Mat Technol New Energy Convers, Harbin 150001, Heilongjiang, Peoples R China

[2] Harbin Inst Technol, Sch Chem & Chem Engn, Inst Adv Chem Power Sources, Harbin 150001, Heilongjiang, Peoples R China

来源：

ENERGY STORAGE MATERIALS | 2018年 / 11卷

基金：

中国国家自然科学基金;

关键词：

Lithium metal; Anode; Electrolyte additive; Solid-electrolyte interphase; Tris; (2; 2; 2-trifluoroethyl); borate; RECHARGEABLE BATTERIES; LITHIUM/POLYMER CELLS; DENDRITIC GROWTH; ION BATTERIES; ANODE; DEPOSITION; PERFORMANCE; INTERPHASE; PERSPECTIVES; POLYSULFIDE;

D O I：

10.1016/j.ensm.2017.10.015

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Lithium metal has been considered as an attractive anode for high energy density lithium battery because of high specific capacity and the lowest redox potential. However, the growth of Li dendrites during cycling has hindered the practical application of Li metal battery (LMB). Herein, TTFEB is adopted as a bifunctional electrolyte additive to improve the performance of Li metal anode, which is beneficial for the surface chemistry of anode and the property of the electrolyte. A LiF-rich SEI layer and enhanced Li+ migration in electrolyte can be achieved with 2% TTFEB, which result in uniform Li deposition without uncontrollable Li dendrites. With controlled Li deposition in TTFEB-containing electrolyte, a significantly improved Coulombic efficiency (similar to 96%) in Li vertical bar Cu cell, long lifetime (over 1000 h), and weak polarization in Li broken vertical bar Li cell can be obtained. Moreover, excellent cycling performance and rate capability of Li vertical bar LiFePO4 cells with TTFEB are also presented in this work. Our strategy provides new insights on the diverse function of electrolyte additives for rechargeable LMB.

引用

页码：197 / 204

页数：8

共 46 条

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