TY - JOUR
T1 - Concentrated LiODFB Electrolyte for Lithium Metal Batteries
AU - Yu, Juan
AU - Gao, Na
AU - Peng, Jiaxin
AU - Ma, Nani
AU - Liu, Xiaoyan
AU - Shen, Chao
AU - Xie, Keyu
AU - Fang, Zhao
N1 - Publisher Copyright:
© Copyright © 2019 Yu, Gao, Peng, Ma, Liu, Shen, Xie and Fang.
PY - 2019/7/18
Y1 - 2019/7/18
N2 - Nowadays, lithium (Li) metal batteries arouse widespread concerns due to its ultrahigh specific capacity (3,860 mAh g−1). However, the growth of Li dendrites has always limited their industrial development. In this paper, the use of concentrated electrolyte with lithium difluoro(oxalate)borate (LiODFB) salt in 1, 2-dimethoxyethane (DME) enables the good cycling of a Li metal anode at high Coulombic efficiency (up to 98.1%) without dendrite growth. Furthermore, a Li/Li cell can be cycled at 1 mA cm−2 for over 3,000 h. Besides, compared to conventional LiPF6-carbonate electrolyte, Li/LiFePO4 cells with 4 M LiODFB-DME exhibit superior electrochemical performances, especially at high temperature (65°C). These outstanding performances can be certified to the increased availability of Li+ concentration and the merits of LiODFB salt. We believe that the concentrated LiODFB electrolyte is help to enable practical applications for Li metal anode in rechargeable batteries.
AB - Nowadays, lithium (Li) metal batteries arouse widespread concerns due to its ultrahigh specific capacity (3,860 mAh g−1). However, the growth of Li dendrites has always limited their industrial development. In this paper, the use of concentrated electrolyte with lithium difluoro(oxalate)borate (LiODFB) salt in 1, 2-dimethoxyethane (DME) enables the good cycling of a Li metal anode at high Coulombic efficiency (up to 98.1%) without dendrite growth. Furthermore, a Li/Li cell can be cycled at 1 mA cm−2 for over 3,000 h. Besides, compared to conventional LiPF6-carbonate electrolyte, Li/LiFePO4 cells with 4 M LiODFB-DME exhibit superior electrochemical performances, especially at high temperature (65°C). These outstanding performances can be certified to the increased availability of Li+ concentration and the merits of LiODFB salt. We believe that the concentrated LiODFB electrolyte is help to enable practical applications for Li metal anode in rechargeable batteries.
KW - Li-metal batteries
KW - LiODFB
KW - concentrated electrolyte
KW - dendrites free
KW - high temperature
UR - https://www.scopus.com/pages/publications/85090966832
U2 - 10.3389/fchem.2019.00494
DO - 10.3389/fchem.2019.00494
M3 - 文章
AN - SCOPUS:85090966832
SN - 2296-2646
VL - 7
JO - Frontiers in Chemistry
JF - Frontiers in Chemistry
M1 - 494
ER -