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Guanidinium-based ionic liquids as new electrolytes for lithium battery |
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| Authors: | Shaohua Fang Jixian Wang Kazuhiro Tachibana |
| Affiliation: | a School of Chemistry and Chemical Technology, Shanghai Jiaotong University, No. 800 Dongchuan Road, MinHang District, Shanghai 200240, China b Department of Chemistry and Chemical Engineering, Faculty of Engineering, Yamagata University, Yamagata 992-8510, Japan c Hitachi Chemical Co. Ltd., Ibaraki-ken 317-8555, Japan |
| Abstract: | Two ionic liquids based on guanidinium cations and TFSA− anion were prepared, and their electrochemical stabilities were investigated. The cathodic limiting potentials of the two ILs were 0.7 V versus Li/Li+, and their electrochemical windows were 4.2 V. However, the lithium plating and striping on Ni electrode could been observed in the two IL electrolytes containing 0.3 mol kg−1 of LiTFSA without additive. And Li/LiCoO2 cells using the two IL electrolytes without additive showed good capacity and cycle property at the current rate of 0.2 C. |
| Keywords: | Lithium battery Ionic liquid Electrolyte Guanidinium cation |
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