Cycling Performances of Lithium-Air Cells Assembled with Mixed Electrolytes of Ionic Liquid and Diethylene Glycol Diethyl Ether
- Authors
- Han, Sang-Min; Kim, Jae-Hong; Kim, Dong-Won
- Issue Date
- Jan-2015
- Publisher
- ELECTROCHEMICAL SOC INC
- Citation
- JOURNAL OF THE ELECTROCHEMICAL SOCIETY, v.162, no.2, pp.A3103 - A3109
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF THE ELECTROCHEMICAL SOCIETY
- Volume
- 162
- Number
- 2
- Start Page
- A3103
- End Page
- A3109
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/158154
- DOI
- 10.1149/2.0161502jes
- ISSN
- 0013-4651
- Abstract
- Ionic liquid-based electrolytes composed of diethylene glycol diethyl ether (DEGDEE) and 1-butyl-1-methyl pyrrolidinium bis(trifluoromethane) sulfonyl imide (BMP-TFSI) were prepared and evaluated for non-aqueous lithium-air cell applications. Adding an appropriate amount of BMP-TFSI to the electrolyte solution improved ionic conductivity, oxidative stability and interfacial stability, and reduced flammability and volatility. When BMP-TFSI was mixed with DEGDEE under optimal condition, the cycle performance was remarkably improved as compared with either the organic electrolyte or ionic liquid electrolyte alone. The Li-air cell assembled with an optimized ionic liquid-based mixed electrolyte initially delivered a high discharge capacity of 10,620 mAh g(-1) and exhibited good cycling stability exceeding 150 cycles at a current density of 0.1 mA cm(-2) by limiting depth of discharge to 500 mAh g(-1).
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