Preparation and characterization of imidazolium-PEO-based Ionene/PVDF(HFP)/LiTFSI as a novel Gel polymer electrolyte

• Published in: Macromolecular research Vol. 23; no. 1; pp. 38 - 44
• Main Authors: Thankamony, Roshni Lilly, Chu, Hodong, Lim, Sanghyun, Yim, Taeeun, Kim, Young-Jun, Kim, Tae-Hyun
• Format: Journal Article
• Language: English
• Published: Heidelberg The Polymer Society of Korea 01.01.2015; 한국고분자학회
• Subjects: Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Complex Fluids and Microfluidics; Nanochemistry; Nanotechnology; Physical Chemistry; Polymer Sciences; Soft and Granular Matter; 고분자공학; thermal stability; ionic conductivity; electrochemical stability; gel polymer electrolyte; imidazolium-PEO-based ionene
• ISSN: 1598-5032; 2092-7673
• DOI: 10.1007/s13233-015-3001-9

The synthesis and properties of a solvent-free gel polymer electrolyte based on an imidazolium-poly(ethylene oxide) (PEO)-based ionene electrolyte, a poly(vinylidene fluoride-hexafluoropropylene) (PVDF(HFP)) support, and the lithium bis(trifluoromethane sulfonyl) imide (LiTFSI) salt are reported. A ternary gel polymer electrolyte film, produced from mixtures of the imidazolium-PEO-based ionene ([IPI][Br]), PVDF(HFP), and LiTFSI, displayed good thermal and mechanical stability. A very high room temperature conductivity of 2.6×10 -3 S/cm and a broad electrochemical stability window were obtained, demonstrating the utility of the electrolyte for practical Li-ion battery applications.