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Properties of N-butyl-N-methyl-pyrrolidinium bis(trifluoromethanesulfonyl) imide based electrolytes as a function of lithium bis(trifluoromethanesulfonyl) imide doping

안주현|김재광|임두현|Johan Scheers|Jagath Pitawala|Susanne Wilken|Patrik Johansson|Aleksandar Matic|Per Jacobsson
한국전기화학회 (The Korean Electrochemical Society)|2011.05|전기화학회지 (Journal of the Korean Electrochemical Society)|제14권 제2호|pp. 92-97

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키워드

Ionic liquid electrolyteLiTFSI dopingLi-ion coordinationElectrochemical stability
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초록

In this study we have investigated the Li-ion coordination, thermal behavior and electrochemical stability of N-butyl-N-methyl-pyrrolidinium bis(trifluoromethanesulfonyl)imide (Py_14TFSI) with lithium bis(trifluoromethanesulfony)imide (LiTFSI) doping intended for use as electrolytes for lithium batteries. The ionic conductivity is reduced and glass transition temperature (T_g) increases with LiTFSI doping concentration. Also, the electrochemical stability increases with LiTFSI doping. A high LiTFSI doping could enhance the electrochemical stability of electrolytes for lithium batteries, whereas the decrease in the ionic conductivity limits the capacity of the battery.

Abstract

In this study we have investigated the Li-ion coordination, thermal behavior and electrochemical stability of N-butyl-N-methyl-pyrrolidinium bis(trifluoromethanesulfonyl)imide (Py_14TFSI) with lithium bis(trifluoromethanesulfony)imide (LiTFSI) doping intended for use as electrolytes for lithium batteries. The ionic conductivity is reduced and glass transition temperature (T_g) increases with LiTFSI doping concentration. Also, the electrochemical stability increases with LiTFSI doping. A high LiTFSI doping could enhance the electrochemical stability of electrolytes for lithium batteries, whereas the decrease in the ionic conductivity limits the capacity of the battery.

참고문헌 (26)

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