Solid polymer electrolytes based on poly(1,3-diacetyl-4-imidazolin-2-one)

• Published in: Polymer bulletin (Berlin, Germany) Germany), 2006-07, Vol.57 (3), p.313-319
• Main Authors: MITSUDA, Hiroyuki, UNO, Takahiro, KUBO, Masataka, ITOH, Takahito
• Format: Article
• Language: English
• Subjects: Applied sciences; Conductivity; Copolymers; Electrical, magnetic and optical properties; Electrolytes; Exact sciences and technology; Ion currents; Lithium; Molten salt electrolytes; Organic polymers; Physicochemistry of polymers; Polymers; Properties and characterization; Solid electrolytes; Thermodynamic properties
• ISSN: 0170-0839; 1436-2449
• DOI: 10.1007/s00289-006-0567-6

SummarySolid polymer electrolytes composed of a homopolymer (poly(AcIM)) of 1,3-diacetyl-1,4-imidazolin-2-one (AcIM) and lithium bis(trifluoromethanesulfonimide) (LiTFSI) or of copolymers (poly(AcIM/VC)) of AcIM with vinylene carbonate (VC) and LiTFSI were prepared and their ionic conductivities and thermal properties were investigated. For the polymer electrolyte of the poly(AcIM) with LiTFSI, the highest ionic conductivity was found at the [Li]/[O] ratio of 1/3 with the values of 8.5×10-5 S/cm at 80 °C and 1.7×10-6 S/cm at 30 °C, respectively. In the polymer electrolyte of poly(AcIM/VC) with LiTFSI at the [Li]/[O] ratio of 1/3, the ionic conductivity increased with increasing VC unit content in the copolymers, and the highest ionic conductivity was found at the AcIM/VC ratio of 39/61 (mol%) with the values of 7.0×10-4 S/cm at 80 °C and 6.7×10-5 S/cm at 30 °C, respectively. This copolymer electrolyte showed a linear relationship between the ionic conductivity and the reciprocal of the temperature, indicative of the system decoupled from the segmental motion of the polymer.