The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 02, 1998
Filed:
Feb. 14, 1997
Mitsutaka Miyabayashi, Ibaraki-ken, JP;
Kanji Sato, Ibaraki-ken, JP;
Masato Nakajima, Ibaraki-ken, JP;
Kouichi Furusato, Ibaraki-ken, JP;
Sumie Sekiguchi, Ibaraki-ken, JP;
Kashima-Kita Electric Power Corporation, Ibaraki-ken, JP;
Abstract
The present invention provides a liquid-circulating battery including a positive electrode, a negative electrode, a permeable membrane interposed between the positive and negative electrodes to hold the same in separated relation to each other and to partition the same into a positive chamber and a negative chamber, two porous liquid-permeable carbon electrodes disposed respectively in the positive and negative electrolytic solutions being circulated respectively into the positive and negative chambers such that an oxidation-reduction reaction occurs and causes charging and discharging, wherein the permeable membrane is an ion-exchange me membrane including as an ion exchanger layer a polymeric pellicle which results from crosslinking of a halogenated alkylated product of an aromatic polysulfone type polymer with use of a polyamine and which has an ion exchange capacity of 0.3 to 8.0 milliequivalent/gram of dry resin and a thickness 0.1 to 120 .mu.m, said polysulfone type polymer having as a recurring unit a group represented at least by the following formula (I); and ##STR1## and wherein each of said positive and negative electrolytic solutions is an electrolytic solution having a vanadium ion concentration of 0.5 to 8 mols/liter.