Electricity storage device

Patent metadata

Field	Value
Publication number	US-9583280-B2
Application number	US-201314416393-A
Country	US
Kind code	B2
Filing date	Jul 12, 2013
Priority date	Jul 26, 2012
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

An electricity storage device maintains low internal resistance and high electric capacity. The nonaqueous-electrolytic-solution hybrid electricity storage device employs an anode into/from which lithium can be intercalated and deintercalated and a cathode including activated carbon, even after high-temperature storage and/or high-temperature charging/discharging. Specifically, this electricity storage device includes an anode into/from which lithium can be intercalated and deintercalated, a cathode that includes activated carbon, and a nonaqueous electrolytic solution, wherein the electricity storage device employs a nonaqueous electrolytic solution that includes at least one type of compound represented by one of general formulas (1) to (5). Details on the general formulas (1) to (5) are as described in the Description.

First claim

The invention claimed is:

1. An electricity storage device, comprising
an anode into/from which lithium can be intercalated and deintercalated,
a cathode that includes activated carbon, and
a nonaqueous electrolytic solution in which a lithium salt is dissolved in an organic solvent, wherein the nonaqueous electrolytic solution includes at least one type of compound represented by one of the following general formulas (1) to (4):

in the above general formula (1), R 1 and R 2 each independently represent a hydrogen atom or a C 1-8 alkyl group, R 3 represents a C 1-8 aliphatic hydrocarbon group that includes or does not include an unsaturated bond (s), and the aliphatic hydrocarbon group represented by R 3 may be substituted by a halogen atom (s);
in the above general formula (2), R 4 and R 5 each independently represent a hydrogen atom or a C 1-8 alkyl group, R 6 represents a C 1-8 aliphatic hydrocarbon group that includes or does not include an unsaturated bond (s), the aliphatic hydrocarbon group represented by R 6 may be substituted by a halogen atom, and n represents 1 or 2;
in the above general formula (3) , R 7 , R 8 ,R 9 , and R 10 each independently represent a C 1-8 aliphatic hydrocarbon group that includes or does not include an unsaturated bond (s), or a C 6-8 aromatic hydrocarbon group, R 7 and R 8 may also represent a fluorine atom, the aliphatic hydrocarbon group and the aromatic hydrocarbon group represented by R 7 , R 8 , R 9 , and R 10 may be substituted by a halogen atom (s), and R 11 represents an oxygen atom or a C 1-8 alkylene group that includes or does not include an ether group (s); and
in the above general formula (4) , R 12 , R 13 , R 14 , R 15 , R 16 , and R 17 each independently represent a C 1-8 aliphatic hydrocarbon group that includes or does not include an unsaturated bond (s), and R 18 represents a C 2-6 bivalent aliphatic hydrocarbon group including an unsaturated bond (s), or a bivalent aromatic hydrocarbon group.

2. The electricity storage device according to claim 1 , wherein the nonaqueous electrolytic solution includes a compound represented by the above general formula (4).

3. The electricity storage device according to claim 2 , wherein the nonaqueous electrolytic solution further includes at least a compound represented by one of the above general formula (1), (2) or (3), or the following general formula (5):

in the above general formula (5), R 19 , R 20 , and R 21 each independently represent a C 1-8 aliphatic hydrocarbon group that includes or does not include an unsaturated bond (s), and m represents 1 or 2.

4. The electricity storage device according to claim 1 , wherein the nonaqueous electrolytic solution includes a compound represented by the above general formula (3).

5. The electricity storage device according to claim 4 , wherein the nonaqueous electrolytic solution further includes at least a compound represented by one of the above general formula (1) or (2) , or the above general formula (5).

6. The electricity storage device according to claim 1 , wherein the electricity storage device is a capacitor.

7. The electricity storage device according to claim 2 , wherein the electricity storage device is a capacitor.

8. The electricity storage device according to claim 3 , wherein the electricity storage device is a capacitor.

9. The electricity storage device according to claim 4 , wherein the electricity storage device is a capacitor.

10. The electricity storage device according to claim 5 , wherein the electricity storage device is a capacitor.

Assignees

• Adeka Corp

Inventors

• Taki Takayuki
• Watanabe Hiroaki
• Shibuya Atsuki
• Tasaki Akiko
• Katsuno Eiji

Classifications

• H01G11/38

  Carbon pastes or blends; Binders or additives therein · CPC title

• H01G11/58 Primary

  Liquid electrolytes · CPC title

• H01G11/64 Primary

  characterised by additives · CPC title

• H01G11/50

  specially adapted for lithium-ion capacitors, e.g. for lithium-doping or for intercalation · CPC title

• H01G11/06

  with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC] · CPC title