Electrode for vanadium redox flow battery and method for manufacturing same

Abstract

Provided is an electrode for a vanadium redox flow battery, having a structure in which at least two carbon material-based papers are stacked, wherein the carbon material-based paper comprises at least one hole pattern

1 . An electrode for a vanadium redox flow battery, having a structure in which at least two carbon material-based papers are stacked, wherein the carbon material-based paper comprises at least one hole pattern. 
     
     
         2 . The electrode for a vanadium redox flow battery according to  claim 1 , wherein the hole pattern of the at least two carbon material-based papers has an arranged structure and, through this, the electrode has a pseudo-channel effect in which the direction of electrolyte flow is determined by the direction of the hole pattern. 
     
     
         3 . The electrode for a vanadium redox flow battery according to  claim 1 , wherein the carbon material-based paper comprises a plurality of patterned lines. 
     
     
         4 . The electrode for a vanadium redox flow battery according to  claim 3 , wherein the patterned line has a V-shaped cross-section. 
     
     
         5 . The electrode for a vanadium redox flow battery according to  claim 1 , wherein the hole pattern of the carbon material-based paper electrode has holes at regular intervals for increased substantial specific surface area of reaction and decreased flow loss. 
     
     
         6 . The electrode for a vanadium redox flow battery according to  claim 1 , wherein the carbon material-based paper has a micro sized thickness, and the carbon paper has a compressibility of 0-40%. 
     
     
         7 . The electrode for a vanadium redox flow battery according to  claim 1 , wherein the carbon material-based paper is in the form of a paper comprising carbon materials and comprises at least one selected from a group consisting of carbon paper and buck paper. 
     
     
         8 . A method for manufacturing the electrode for a vanadium redox flow battery according to  claim 1 , comprising:
 a step of forming a hole pattern in a carbon material-based paper; and   a step of stacking the carbon material-based paper with the hole pattern formed.   
     
     
         9 . The method for manufacturing the electrode for a vanadium redox flow battery according to  claim 8 , which further comprises, after the step of forming the hole pattern in the carbon material-based paper, a step of removing impurities produced during the formation of the hole pattern. 
     
     
         10 . The method for manufacturing the electrode for a vanadium redox flow battery according to  claim 9 , wherein the hole pattern is formed by at least one selected from a group consisting of plasma processing, laser processing, CNC processing and needle punching. 
     
     
         11 . The method for manufacturing the electrode for a vanadium redox flow battery according to  claim 10 , wherein the plasma processing is performed by forming a hole pattern on the carbon material-based paper with activated gas ion using a masking plate having the hole pattern. 
     
     
         12 . The method for manufacturing the electrode for a vanadium redox flow battery according to  claim 11 , wherein the carbon material-based paper is surface-treated at the same time as the hole pattern is formed by the plasma processing. 
     
     
         13 . The method for manufacturing the electrode for a vanadium redox flow battery according to  claim 11 , wherein the step of removing impurities produced during the formation of the hole pattern is performed by at least one selected from a group consisting of dip cleaning, spray cleaning, ultrasonic cleaning, compressed air spraying and vacuum cleaning. 
     
     
         14 . A vanadium redox flow battery comprising the electrode for a vanadium redox flow battery according to  claim 1 . 
     
     
         15 . An energy storage system comprising the vanadium redox flow battery according to  claim 14 .