TY  - JOUR
PY  - 2019//
TI  - Intrinsic flame-retardant organic electrolyte for safe lithium-sulfur batteries
JO  - Angewandte Chemie (International ed. in English)
A1  - Yang, Huijun
A1  - Guo, Cheng
A1  - Chen, Jiahang
A1  - Naveed, Ahmad
A1  - Yang, Jun
A1  - NuLi, Yanna
A1  - Wang, Jiulin
SP  - 791
EP  - 795
VL  - 58
IS  - 3
N2  - Safety concern poses a significant challenge for the large-scale employment of lithium-sulfur batteries. Extreme flammable conventional electrolyte and dendritic lithium deposition cause severe safety issues. Herein, we report an intrinsic flame-retardant (IFR) electrolyte consisting of 1.1 M lithium bis(fluorosulfonyl)imide in a solvent mixture of flame-retardant triethyl phosphate and high flash point solvent 1,1,2,2-tetrafluoroethyl 2,2,3,3-tetrafluoropropyl (1:3, v/v) for safe lithium-sulfur (Li-S) batteries. This electrolyte exhibits favorable flame-retardant property and high reversibility of lithium metal anode (Coulombic efficiency >99%). Importantly, this IFR electrolyte enables stable lithium plating/stripping behavior with micro-sized and dense-packing lithium deposition at high temperatures. When coupled with sulfurized pyrolyzed poly(acrylonitrile) cathode (sulfur content: 52.6 wt%), Li-S batteries deliver high composite capacity (840.1 mAh g-1) and high sulfur utilization of 95.6%. More advantages of this system are its enhanced energy conversion efficiency and energy density under high temperature operation.<br><br>© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.<p />  <p>Language: en</p>
LA  - en
SN  - 1433-7851
UR  - http://dx.doi.org/10.1002/anie.201811291
ID  - ref1
ER  -