Accumulator material and accumulator device

Abstract

An electricity storage device including a positive electrode, a negative electrode, and an electrolytic solution located between the positive electrode and the negative electrode. At least one of the positive electrode 31 and the negative electrode contains an electricity storage material containing a polymerization product having a tetrachalcogenofulvalene structure in a repeat unit of a main chain.

1 . An electricity storage device comprising:
 a positive electrode;   a negative electrode; and   an electrolyte located between the positive electrode and the negative electrode,   wherein at least one of the positive electrode and the negative electrode comprises an electricity storage material containing a polymerization product having a tetrachalcogenofulvalene structure in a repeat unit of a main chain of the polymerization product, and   the polymerization product has a degree of polymerization of 4 or greater.   
     
     
         2 . The electricity storage material of  claim 1 , wherein the main chain of the polymerization product is formed of the tetrachalcogenofulvalene structures directly bonded to each other. 
     
     
         3 . The electricity storage material of  claim 2 , wherein the polymerization product is a copolymerization product of two or more types of monomers which contain the tetrachalcogenofulvalene structures having different substituents from each other. 
     
     
         4 . The electricity storage material of  claim 1 , wherein the polymerization product is a copolymerization product of a first monomer and a second monomer, the first monomer containing at least one selected from the group consisting of an acetylene structure and a thiophene structure, and the second monomer containing the tetrachalcogenofulvalene structure. 
     
     
         5 . The electricity storage material of  claim 1 , wherein the tetrachalcogenofulvalene structure is a tetrathiafulvalene structure. 
     
     
         6 . The electricity storage material of  claim 1 , wherein the polymerization product has a degree of polymerization of 10 or greater. 
     
     
         7 . The electricity storage material of  claim 1 , wherein:
 the tetrachalcogenofulvalene structure is represented by general formula (1) shown below; and   in general formula (1), X is an oxygen atom, a sulfur atom, a selenium atom or a tellurium atom; two selected from R1 through R4 each represent a bond with an adjacent repeat unit; the other two are each independently at least one selected from the group consisting of a chained saturated hydrocarbon group, a chained unsaturated hydrocarbon group, a cyclic saturated hydrocarbon group, a cyclic unsaturated hydrocarbon group, a phenyl group, a hydrogen atom, a hydroxyl group, a cyano group, an amino group, a nitro group and a nitroso group; and the chained saturated hydrocarbon group, the chained unsaturated hydrocarbon group, the cyclic saturated hydrocarbon group and the cyclic unsaturated hydrocarbon group each contain at least one selected from the group consisting of a carbon atom, an oxygen atom, a nitrogen atom, a sulfur atom and a silicon atom.   
       
         
           
           
               
               
           
         
       
     
     
         8 . The electricity storage material of  claim 2 , wherein:
 the polymerization product is represented by general formula (2) shown below; and   in general formula (2), X is an oxygen atom, a sulfur atom, a selenium atom or a tellurium atom; R5 and R6 are each independently at least one selected from the group consisting of a chained saturated hydrocarbon group, a chained unsaturated hydrocarbon group, a cyclic saturated hydrocarbon group, a cyclic unsaturated hydrocarbon group, a phenyl group, a hydrogen atom, a hydroxyl group, a cyano group, an amino group, a nitro group and a nitroso group; and the chained saturated hydrocarbon group, the chained unsaturated hydrocarbon group, the cyclic saturated hydrocarbon group and the cyclic unsaturated hydrocarbon group each contain at least one selected from the group consisting of a carbon atom, an oxygen atom, a nitrogen atom, a sulfur atom and a silicon atom.   
       
         
           
           
               
               
           
         
       
     
     
         9 . The electricity storage material of  claim 8 , wherein X is a sulfur atom; and R5 and R6 are each a chained hydrocarbon group or an aromatic group. 
     
     
         10 . The electricity storage material of  claim 8 , wherein X is a sulfur atom; and R5 and R6 are each C 6 H 13 , C 10 H 21 , C 8 H 17  or C 6 H 5 . 
     
     
         11 . The electricity storage material of  claim 3 , wherein:
 the polymerization product is a copolymerization product containing repeat units represented by general formulas (3) and (4) shown below; and   in general formulas (3) and (4), X is an oxygen atom, a sulfur atom, a selenium atom or a tellurium atom; R5 through R8 are each independently at least one selected from the group consisting of a chained saturated hydrocarbon group, a chained unsaturated hydrocarbon group, a cyclic saturated hydrocarbon group, a cyclic unsaturated hydrocarbon group, a phenyl group, a hydrogen atom, a hydroxyl group, a cyano group, an amino group, a nitro group and a nitroso group; the chained saturated hydrocarbon group, the chained unsaturated hydrocarbon group, the cyclic saturated hydrocarbon group and the cyclic unsaturated hydrocarbon group each contain at least one selected from the group consisting of a carbon atom, an oxygen atom, a nitrogen atom, a sulfur atom and a silicon atom; and a combination of R5 and R6 is different from a combination of R7 and R8.   
       
         
           
           
               
               
           
         
       
     
     
         12 . The electricity storage material of  claim 11 , wherein X is a sulfur atom; R5 and R6 are each a phenyl group; and R7 and R8 are each a chained hydrocarbon group. 
     
     
         13 . The electricity storage material of  claim 4 , wherein:
 the polymerization product is represented by general formula (5) shown below;   in general formula (5), X is an oxygen atom, a sulfur atom, a selenium atom or a tellurium atom; and R5 and R6 are each independently at least one selected from the group consisting of a chained saturated hydrocarbon group, a chained unsaturated hydrocarbon group, a cyclic saturated hydrocarbon group, a cyclic unsaturated hydrocarbon group, a phenyl group, a hydrogen atom, a hydroxyl group, a cyano group, an amino group, a nitro group and a nitroso group;   the chained saturated hydrocarbon group, the chained unsaturated hydrocarbon group, the cyclic saturated hydrocarbon group and the cyclic unsaturated hydrocarbon group each contain at least one selected from the group consisting of a carbon atom, an oxygen atom, a nitrogen atom, a sulfur atom and a silicon atom; and   R9 is a chained unsaturated hydrocarbon group or a cyclic unsaturated hydrocarbon group each containing an acetylene structure, and contains at least one selected from the group consisting of a carbon atom, an oxygen atom, a nitrogen atom, a sulfur atom and a silicon atom.   
       
         
           
           
               
               
           
         
       
     
     
         14 . The electricity storage material of  claim 13 , wherein X is a sulfur atom; R5 and R6 are each a phenyl group or a chained hydrocarbon group; and R9 has a structure represented by chemical formula (9) shown below. 
       
         
           
           
               
               
           
         
       
     
     
         15 . The electricity storage material of  claim 4 , wherein:
 the polymerization product is represented by general formula (7) shown below;   in general formula (7), X is an oxygen atom, a sulfur atom, a selenium atom or a tellurium atom; R5 and R6 are each independently at least one selected from the group consisting of a chained saturated hydrocarbon group, a chained unsaturated hydrocarbon group, a cyclic saturated hydrocarbon group, a cyclic unsaturated hydrocarbon group, a phenyl group, a hydrogen atom, a hydroxyl group, a cyano group, an amino group, a nitro group and a nitroso group; and the chained saturated hydrocarbon group, the chained unsaturated hydrocarbon group, the cyclic saturated hydrocarbon group and the cyclic unsaturated hydrocarbon group each contain at least one selected from the group consisting of a carbon atom, an oxygen atom, a nitrogen atom, a sulfur atom and a silicon atom; and   R10 is a chained unsaturated hydrocarbon group or a cyclic unsaturated hydrocarbon group each containing a thiophene structure, and contains at least one selected from the group consisting of a carbon atom, an oxygen atom, a nitrogen atom, a sulfur atom and a silicon atom.   
       
         
           
           
               
               
           
         
       
     
     
         16 . The electricity storage material of  claim 15 , wherein X is a sulfur atom; R5 and R6 are each a phenyl group or a chained hydrocarbon group; and R10 has a structure represented by any of chemical formulas (8) through (12) shown below. 
       
         
           
           
               
               
           
         
       
     
     
         17 . The electricity storage device of  claim 1 , wherein:
 at least one of the positive electrode and the negative electrode comprises a conductive support and an electricity storage layer provided on the conductive support that comprises the electricity storage material.   
     
     
         18 . The electricity storage device of  claim 17 , wherein the electricity storage layer contains a conductive substance. 
     
     
         19 . The electricity storage device of  claim 1 , wherein the electrolyte contains a salt of a quaternary ammonium cation and an anion. 
     
     
         20 . The electricity storage device of  claim 17 , wherein:
 the positive electrode includes the conductive support and the electricity storage layer provided on the conductive support,   the negative electrode contains a negative electrode active substance capable of occluding and releasing lithium ion, and   the electrolyte contains a salt formed of the lithium ion and an anion and filling an area between the positive electrode and the negative electrode.   
     
     
         21 . A mobile electronic device, comprising the electricity storage device defined by  claim 20 . 
     
     
         22 . A vehicle, comprising the electricity storage device defined by  claim 20 . 
     
     
         23 . The electricity storage device of  claim 1 , wherein the positive electrode comprises the electricity storage material. 
     
     
         24 . The electricity storage device of  claim 1 , wherein the negative electrode comprises the electricity storage material.