Ambient lithium-SO2 batteries with ionic liquids as electrolytes.
Li-SO2 batteries have a high energy density but bear serious safety problems that are associated with pressurized SO2 and flammable solvents in the system. Herein, a novel ambient Li-SO2 battery was developed through the introduction of ionic liquid (IL) electrolytes with tailored basicities to solvate SO2 by reversible chemical absorption. By tuning the interactions of ILs with SO2, a high energy density and good discharge performance with operating voltages above 2.8 V were obtained. This strategy based on reversible chemical absorption of SO2 in IL electrolytes enables the development of the next generation of ambient Li-SO2 batteries.
Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027 (China); Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 (USA). xinghb@zju.edu.cn.
Huabin
H
Xing
Chen
C
Liao
Qiwei
Q
Yang
Gabriel M
GM
Veith
Bingkun
B
Guo
Xiao-Guang
XG
Sun
Qilong
Q
Ren
Yong-Sheng
YS
Hu
Sheng
S
Dai
D011211:Electric Power Supplies; D055664:Electrochemical Techniques; D004573:Electrolytes / Q000737:chemistry*; D052578:Ionic Liquids / Q000737:chemistry*; D008094:Lithium / Q000737:chemistry*; D010084:Oxidation-Reduction; D013458:Sulfur Dioxide / Q000737:chemistry*
D004573:Electrolytes; D052578:Ionic Liquids; D013458:Sulfur Dioxide; D008094:Lithium
absorption; ionic liquids; lithium; primary batteries; sulfur dioxide