| 摘要 |
A solid polymeric electrolyte, in the form of a membrane, including a solution of an ion compound in a cross-linked polyether encompassing a liquid plasticizer, is obtained: a) by copolymerizing a vinyl ether having the formula: R-(O-CH2-CH2-)n-O-CH=CH2 (I> wherein R indicates the methyl or ethyl radical; n is an integer varying from 1 to 16 with an allyl vinyl ether having the formula: CH2=CH-CH2-(O-CH2-CH2-)m-O-CH=CH2 (II> wherein: m is an integer varying from 1 to 10, with a molar ratio between (I) and (II) of between 70/30 and 95/5, to obtain a copolymer having allyl unsaturations; b) by hydrosilylating the double allyl bond of the copolymer obtained in step (a) by reaction with an alkoxy silane selected from trimethoxy and triethoxy silane, to obtain a hydrosylilated copolymer; c) by cross-linking the hydrosilylated copolymer obtained in step (b) by means of a diprotic cross-linking agent operating in solution in a plasticizer, selected from an oligomer or a dipolar aprotic solvent in a quantity of 20 to 80% by weight, in the presence of an ion compound and evaporating the low-boiling compounds formed in the cross-linking reaction to obtain a membrane capable of encompassing the liquid plasticizer. This solid polymeric electrolyte is mechanically resistant, dimensionally stable and highly conductive even at low temperatures. The solid polymeric electrolyte can be used as an electrolytic separator in electrochemical devices, optical displays and sensors. <IMAGE> |
