| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a solid polymer electrolyte having improved ion transmissivity and oxidation resistance. <P>SOLUTION: The solid polymer electrolyte includes a 100 pts.wt aromatic polyimide consisting dominantly of repetitive units represented by a formula (I), its isomer and a formula (III), where copolymer mole fraction (III)/ä(I)+(I) isomer} is 5 or smaller, and 0.1-100 pts.wt acid such as phosphoric acid, polyphosphoric acid, sulphuric acid, or methansulfonic acid. <P>COPYRIGHT: (C)2010,JPO&INPIT |
