Electricity storage device
View Patent ↗Disclosed is an electricity storage device including a first electrode (a positive electrode ( 20 )), a second electrode (a negative electrode ( 21 )), and a non-aqueous electrolyte solution. The first electrode contains, as an active material, an organic compound having a quinone skeleton. The second electrode has a polarity opposite to that of the first electrode. The non-aqueous electrolyte solution contains a lithium salt and a solvent represented by the following formula (1): R—O(CH 2 CH 2 O) n —R′ (1) where R and R′ are each independently a saturated hydrocarbon having 1 to 5 carbon atoms, and n is an integer of 2 to 6.
1. An electricity storage device comprising:
a first electrode containing, as an active material, a polymer compound that is an organic compound having an ortho-quinone skeleton;
a second electrode having a polarity opposite to that of the first electrode; and
a non-aqueous electrolyte solution containing a lithium salt and a solvent represented by the following formula (1):
R—O(CH 2 CH 2 O) n —R′ (1)
where R and R′ are saturated hydrocarbons having the same structure and each having 1 to 5 carbon atoms, and n is 3 or 4,
wherein the non-aqueous electrolyte solution contains 0.8 to 1.5 moles of the solvent represented by the formula (1) per mole of the lithium salt.
2. The electricity storage device according to claim 1 , wherein the non-aqueous electrolyte solution further contains a chain carbonic ester.
3. The electricity storage device according to claim 2 , wherein the non-aqueous electrolyte solution contains 1 to 10 moles of the chain carbonic ester per mole of the lithium salt.
4. The electricity storage device according to claim 2 , wherein the non-aqueous electrolyte solution contains 3 to 10 moles of the chain carbonic ester per mole of the lithium salt.
5. The electricity storage device according to claim 1 , wherein the lithium salt is an imide salt.
6. The electricity storage device according to claim 1 , wherein a solvent component of the non-aqueous electrolyte solution consists essentially of the solvent represented by the formula (1).
7. The electricity storage device according to claim 1 , wherein the polymer compound is a polymer compound having a 9,10-phenanthrenequinone skeleton in a main chain or a side chain.
8. The electricity storage device according to claim 1 , wherein the polymer compound is a polymer compound having a 4,5,9,10-pyrenetetraone skeleton in a main chain or a side chain.
9. The electricity storage device according to claim 1 , wherein the non-aqueous electrolyte solution further contains a carbonic ester.