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Lithium-oxygen batteries with ester-functionalized ionic liquid-based electrolytes
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DOI：10.1039/c5ra13682b.png)
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摘要
En 中文
Ester-functionalized ionic liquids with different cations (imidazolium, pyrrolidinium, piperidinium, morpholinium) and a bis(trifluoromethanesulfonyl) imide anion were synthesized and subsequently mixed with tetra(ethylene glycol) dimethylether (TEGDME) at different concentrations. The mixed solutions were ultimately investigated for their applicability as the electrolyte in non-aqueous lithium-oxygen batteries. Among the ionic liquids investigated, the pyrrolidinium-based ionic liquid, ethyl-N-methylpyrrolidinium-N-acetate bis(trifluoromethanesulfonyl) imide (MEEsPyr-TFSI), exhibited a lower viscosity, higher ionic conductivity and wider electrochemical stability window than any other ionic liquids. The addition of an appropriate amount of MEEsPyr-TFSI to the TEGDME-based organic electrolyte had a positive effect on the ionic conductivity, electrochemical stability and oxygen radical stability. A mixed ionic liquid-based solution with an optimum composition was successfully employed as a promising electrolyte for lithium-oxygen batteries with good cycling stability.
Keyword:
LI-AIR BATTERY
TEMPERATURE MOLTEN-SALTS
GLYCOL DIETHYL-ETHER
LI-O-2 BATTERIES
ELECTROCHEMICAL PERFORMANCE
CARBONATE ELECTROLYTES
GRAPHENE NANOSHEETS
CATHODE CATALYSTS
CELLS
STABILITY
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期刊
IF:
4.6
论文数:
7.8K
被引数:
20.9W
机构
引用论文
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