Title:
DIAPHRAGM FOR VANADIUM-BASED REDOX FLOW CELL AND MANUFACTURE THEREOF
Document Type and Number:
Japanese Patent JP3797578
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an ion exchange membrane which is low in membrane resistance as a diaphragm, excellent in permeability of proton, low in permeability of vanadium ion and excellent in oxidation resistance by making cross- linking polymer having pyridinium group into a diaphragm for vanadium system redox flow cell.
SOLUTION: Charging/discharging is performed by utilizing oxidation reduction reaction of V2+/V3+ within a negative electrode liquid isolated via an ion exchange membrane and V4+/V5+ within a positive electrode liquid. In this vanadium-based redox flow cell, a diaphragm for cell made of cross-linking polymer having pyridinium group is used as the ion exchange membrane. As the cross-linking polymer having this pyridinium group, ion exchange capacity 0.2 to 10mmol/g-dry membrane an overall dialysis coefficient ratio UH/UMg 50 or more of proton and magnesium ion are preferable. The cross-linking polymer is obtained by converting pyridyl group into the pyridinium group after pyridyl group vinyl polymerization monomer 100 pts.wt. cross-linking agent 1 to 100 pts.wt. monofunctional vinyl polymerization monomer or styrene system monomer 0 to 100 pts.wt. are copolymerized.
Inventors:
Kanji Sakata
Tatsuya Front
Yamamoto Yoshikazu
Hiroki Hirayama
Tatsuya Front
Yamamoto Yoshikazu
Hiroki Hirayama
Application Number:
JP31784897A
Publication Date:
July 19, 2006
Filing Date:
November 19, 1997
Export Citation:
Assignee:
Tokuyama Corporation
Kansai Electric Power Co., Inc.
Sumitomo Electric Industries, Ltd.
Kansai Electric Power Co., Inc.
Sumitomo Electric Industries, Ltd.
International Classes:
C08F8/44; H01M8/18; C08F26/08; H01M8/02; (IPC1-7): H01M8/18; C08F8/44; C08F26/08; H01M8/02
Domestic Patent References:
| JP63053860A | ||||
| JP9245805A | ||||
| JP10012261A | ||||
| JP63024565A |
Attorney, Agent or Firm:
Kaname Naganuma