| 摘要 |
<P>PROBLEM TO BE SOLVED: To enhance proton conductivity from a new viewpoint of increasing the content of inorganic acid such as phosphoric acid which is involved in development of the proton conductivity. <P>SOLUTION: A PBI membrane which is deposited and formed using poly-2,2'-(m-phenylene)-5,5'-bibenzyl-imidazole is immersed in a mixed solution containing adenylic acid and phosphoric acid. The resulting PBI membrane contains adenylic acid as well as phosphoric acid. Therefore, absorption of phosphoric acid to imidazole group contained in adenylic acid and inclusion of phosphoric acid group in adenylic acid itself increase the content of phosphoric acid in an electrolyte membrane, thereby allowing to achieve high proton conductivity. <P>COPYRIGHT: (C)2008,JPO&INPIT |
