Electrophysical behavior of ion-conductive organic-inorganic polymer system based on aliphatic epoxy resin and salt of lithium perchlorate

• Published in: Nanoscale research letters 2014-12, Vol.9 (1), p.2497-2497, Article 674
• Main Authors: Matkovska, Liubov, Iurzhenko, Maksym, Mamunya, Yevgen, Matkovska, Olga, Demchenko, Valeriy, Lebedev, Eugene, Boiteux, Gisele, Serghei, Anatoli
• Format: Article
• Language: English
• Subjects: Chemical Sciences; Chemistry and Materials Science; Material chemistry; Materials Science; Molecular Medicine; Nano Express; Nanochemistry; Nanoscale Science and Technology; Nanotechnology; Nanotechnology and Microengineering; Nanotechnology and Nanomaterials (NANO-2014); Polymers
• ISSN: 1931-7573; 1556-276X; 1556-276X
• DOI: 10.1186/1556-276X-9-674

In the present work, ion-conductive hybrid organic-inorganic polymers based on epoxy oligomer of diglycide aliphatic ester of polyethylene glycol (DEG) and lithium perchlorate (LiClO 4 ) were synthesized. The effect of LiClO 4 content on the electrophysical properties of epoxy polymers has been studied by differential scanning calorimetry (DSC) and broadband dielectric spectroscopy (BDS). The effect of LiClO 4 content on the structure has been studied by wide-angle X-ray scattering (WAXS). It was found that LiClO 4 impacts on the structure of the synthesized hybrid epoxy polymers, probably, by formation of coordinative complexes {ether oxygen-lithium cations-ether oxygen} as evidenced from a significant increase in their glass transition temperatures with increasing LiClO 4 concentration and WAXS studies. The presence of ether oxygen in DEG macromolecules provides a transfer mechanism of the lithium cations with the ether oxygen similar to polyethylene oxide (PEO). Thus, the obtained hybrid polymers have high values of ionic conductivity σ' (approximately 10 −3 S/cm) and permittivity ϵ' (6 × 10 5 ) at elevated temperatures (200°С). On the other hand, DEG has higher heat resistance compared to PEO that makes these systems perspective as solid polymer electrolytes able to operate at high temperature. PACS 81.07.Pr; 62.23.St; 66.30.hk