Inorganic-organic copolymers as solid state ionic conductors with grafted anions

✍ Scribed by Michael Popall; Xin-Min Du

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 343 KB
• Volume: 40
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(95)00183-f

✦ Synopsis

Inorganic-organic copolymers (ORMOCER@s) are hybrid polymeric materials consisting of interconnected inorganic oxidic (Si, Al, Zr, etc.) components and organic (polyethylene, poly(meth-)acrylates, polyethylene oxides, etc.) components. Synthesis is carried out via sol-gel processing in combination with organic crosslinking reactions of reactive functionalixed organosilanes. Depending on chemical composition and processing parameters, special properties are available to meet the material requirements of applied technology.

To overcome the general problems resulting from anion movement in using salts and acids, alkylsulfone functionalixed alkoxysilanes were cocondensed with reactive polymerixable alkoxysilanes such as 3-methacryloxypropyl-(for uo-initiated polymerization of the organics) and 3glycidoxypropyLtrL methoxysilane (for thermally initiated polymerization). ORMOCER@ resins containing grafted lithium sulfone groups produce, after final curing of the organ&, amorphous membranes and coatings with high conductivities up to lo-'R-cm-' at RT without plastiaisers. Considering proton conductors, optically transparent water stable membranes with proton conductivities up to 10-2~-L cm-' at RT are available depending on the content of -SO,H groups and coordinated water. Thermal stability of the amorphous network has been measured up to 180°C.