Electrolyte Solution for Redox Flow Battery and Redox Flow Battery Comprising Same

Abstract

The provided are an electrolyte for redox flow battery and a redox flow battery comprising the same, wherein the electrolyte for redox flow battery comprises a solute and a solvent, wherein said solute comprises at least one of anode active material and cathode active material, wherein said anode active material comprises at least one of organic compounds having a carbonyl group such as benzophenone-, benzoquinone-, dimethyl terephthalate-, and 1,4-diacetylbenzene-based organic compounds, and said cathode active material comprises at least one of amine-, tetrathiafulvalene-, and N,N,N′,N′-tetramethyl-p-phenylenediamine-based organic compounds.

1 . A redox flow battery electrolyte comprising a solute and a solvent,
 wherein the solute comprises cathode active material,   wherein the cathode active material comprises at least of one of tetrathiafulvalene-, and N,N,N′,N′-tetramethyl-p-phenylenediamine-based organic compounds.   
     
     
         2 . The redox flow battery electrolyte of  claim 1 , wherein the solvent comprises an organic solvent. 
     
     
         3 . The redox flow battery electrolyte of  claim 2 , wherein the solvent further comprises an aqueous solvent. 
     
     
         4 . The redox flow battery electrolyte of  claim 1 , wherein when an oxidation- reduction reaction of the electrolyte comprising 0.01M of the solute is analyzed using a cyclic voltammetry method at a scanning speed of 100 mV s −1 , a difference in potentials (Epa-Epc) where a peak current for each of the oxidation reaction and the reduction reaction is confirmed is 0.5V or less. 
     
     
         5 . (canceled) 
     
     
         6 . The redox flow battery electrolyte of  claim 1 , wherein the cathode active material comprises at least one of hydrogen, methyl group, ethyl group, benzyl group, butoxycarbonylmethyl group, carboxylmethyl group and aminocarbonylmethyl group. 
     
     
         7 . The redox flow battery electrolyte of  claim 2 , wherein said organic solvent comprises at least one of acetonitrile, dimethylcarbonate, diethylcarbonate, dimethylsulfoxide, dimethylformamide, propylene carbonate, ethylene carbonate, N-methyl-2-pyrrolidone and fluoroethylene carbonate. 
     
     
         8 . The redox flow battery electrolyte of  claim 3 , wherein said aqueous solvent comprises at least one of sulfuric acid, hydrochloric acid and phosphoric acid. 
     
     
         9 . The redox flow battery electrolyte of  claim 1 , wherein a solubility of the solute in the solvent is 0.1M to 10M. 
     
     
         10 . (canceled) 
     
     
         11 . A redox flow battery comprising a cathode active material, and further comprising at least one of a metal-ligand compound and an anode active material, wherein the cathode active material comprises at least of one of tetrafulvalene-, and N,N,N′,N′-tetramethyl-p-phenylenediamine-based organic compound. 
     
     
         12 . (canceled) 
     
     
         13 . The redox flow battery of  claim 11 , wherein the metal-ligand compound constitutes an anode and the electrolyte comprising the cathode active material constitutes a cathode. 
     
     
         14 . The redox flow battery of  claim 11 , wherein the electrolyte comprising the anode active material constitutes an anode and the electrolyte comprising the cathode active material constitutes a cathode. 
     
     
         15 . The redox flow battery of  claim 11  further comprising an organic solvent. 
     
     
         16 . The redox flow battery of  claim 11 , wherein the anode active material comprises at least of one of benzophenone- and benzoquinone-based organic compounds. 
     
     
         17 . The redox flow battery of  claim 16 , wherein the anode active material comprises at least one of hydrogen, methyl group, ethyl group, benzyl group, butoxycarbonylmethyl group, carboxylmethyl group and aminocarbonylmethyl group. 
     
     
         18 . The redox flow battery of  claim 14 , wherein a potential difference between an oxidation reaction and a reduction reaction of the anode electrolyte comprising the anode active material and the cathode electrolyte comprising the cathode active material is 1.4V or more.