Inorganic—organic copolymers as solid state Li+ electrolytes

✍ Scribed by Michael Popall; Hervé Durand

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 485 KB
• Volume: 37
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(92)80118-6

✦ Synopsis

Inorganic-organic copolymers (ORMOCERs = ORganically MOdified CERamics), which are synthesized by sol-gel processing, were developed as host materials for lithium salts. They consist of an inorganic oxidic backbone (Si, Zr, erc) chemically bonded to an organic network, eg by use of functional&d organosilanes, and are prepared by polycondensation (to form the inorganic oxidic network) in combination with organic crosslinking reactions. Dissolution of controlled amounts of LiClO, in the ORMOCERcontaining grafted polyethylene oxide leads to an electrolyte. The material is amorphous according to X-ray diffraction patterns. It has an ion conductivity of (r = low5 n-' cn-' at room temperature and u = 10e3 0-r cm-' at 125°C. The material can be applied as coating or bulk by standard technologies and shows good adhesion to various substrate materials. Final curing can be initiated by au-light and/or thermal treatment.