An imidazolium-based polymerized ionic liquid via novel synthetic strategy as polymer electrolytes for lithium ion batteries

作者：Yin, Kun; Zhang, Zhengxi; Yang, Li^*; Hirano, Shin Ichi

来源：Journal of Power Sources, 2014, 258: 150-154.

DOI：10.1016/j.jpowsour.2014.02.057

• Polymerized ionic liquid
• Synthesis
• Imidazolium-based ionic liquid
• Polymer electrolyte
• Lithium ion battery

An imidazolium-based polymerized ionic liquid (PIL), poly(1-ethyl-3-vinylimidazolium bis(tri-fluoromethanesulfonylimide)) is successfully synthesized via a new three-step process comprising the direct radical polymerization of the 1-vinylimidazole monomer, and subsequent quaternization reaction followed by an anion exchange procedure. Furthermore, polymer electrolytes are prepared by blending as-obtained PIL as the polymer host with an ionic liquid and LiTFSI salt. Electrochemical measurements demonstrate that compared with polymer electrolytes containing the PIL host synthesized by the conventional route, polymer electrolytes containing the PIL host obtained by new synthetic process exhibit significantly improved capacity and cycling performance, which is due to higher ionic liquid content.

• 出版日期2014-7-15
• 单位上海交通大学