Low‐Polarization Lithium–Oxygen Battery Using [DEME][TFSI] Ionic Liquid Electrolyte
默尼科技，專業(yè)提供DEME TFSI產(chǎn)品及其技術(shù)
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The room‐temperature molten salt mixture of N,N‐diethyl‐N‐(2‐methoxyethyl)‐N‐methylammonium bis(trifluoromethanesulfonyl) imide ([DEME][TFSI]) and lithium bis(trifluoromethanesulfonyl)imide
(LiTFSI) salt is herein reported as electrolyte for application in Li–O2 batteries. The [DEME][TFSI]–LiTFSI solution is studied in terms of ionic conductivity,
viscosity, electrochemical stability, and compatibility with lithium metal at 30?°C,
40?°C, and 60?°C. The electrolyte shows suitable properties for application in Li–O2 battery, allowing a reversible, low‐polarization discharge–charge performance with
a capacity of about 13?Ah?g
in the positive electrode and coulombic efficiency approaching 100?%. The reversibility
of the oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) is demonstrated
by ex?situ XRD and SEM studies. Furthermore, the study of the cycling behavior of
the Li–O2 cell using the [DEME][TFSI]‐LiTFSI electrolyte at increasing temperatures (from 30
to 60?°C) evidences enhanced energy efficiency together with morphology changes of
the deposited species at the working electrode. In addition, the use of carbon‐coated
Zn0.9Fe0.1O (TMO‐C) lithium‐conversion anode in an ionic‐liquid‐based Li‐ion/oxygen configuration
is preliminarily demonstrated.
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標簽: 電池 DEME TFSI
