Electrochemical capacitor
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsYoshinori Takamuka, Hideki Shimamoto
Life of this patent
Estimating the term…
Abstract
An electrochemical capacitor comprising a pair of oxidation-reduction active electrodes and an electrolyte solution or an ion-conductive solid electrolyte between the electrodes, wherein the electrodes contain a specific copolymer, thereby providing the electrochemical capacitor high in energy density and excellent in heat-resistance and charge/discharge cycle features.
Claims6
An electrochemical capacitor comprising a pair of oxidation-reduction active electrodes with an electrolyte or an ionic conductive solid electrolyte sandwiched between said oxidation-reduction active electrodes, wherein said oxidation-reduction active electrode contains a copolymer expressed by a chemical formula 1;
- wherein the chemical formula 1 is shown as:
- Ra—(C2Rc4)l—(OC2Rd4)m—(X)n—Rb, or
- Ra—[—(C2Rc4)l—(OC2Rd4)m—(X)n—]p—Rb (Chemical Formula 1)
- , where Ra and Rb are, respectively, hydrogen, fluorine, an alkyl group with 1 to 15 of carbon, a fluoroalkyl group, an alkenyl group and a fluoroalkenyl group, or a phenyl group, a fluorophenyl group, a sulfone group, an amino group, a nitro group and a cyano group, and Ra and Rb are allowed to be the same with or different from each other;
- and
- Rc and Rd are selected from hydrogen, fluorine, an alkyl group with 1 to 15 of carbon, a fluoroalkyl group, an alkenyl group and a fluoroalkenyl group, or a phenyl group, a fluorophenyl group, a sulfone group, an amino group, a nitro group and a cyano group, or a chemical formula A, and said respective four Rc and Rd are allowed to be the same with or different from one another;
- and
- the chemical formula A is described by a general expression as follows:
- —(CO)ORe, —(CH2)Ra—(OC2Rb4)b—ORe
- , where Re is hydrogen or an alkyl group, and “a” and “b” are integers of 0 to 20 and allowed to be the same with or different from each other;
- in the chemical formula 1, “l” and “m” are integers of 0 or larger and not 0 simultaneously, and “n” and “p” are natural numbers of 1 or larger;
- X is any one species, or two or more species out of chemical species described by a general expression as follows:
- R1 to R6 are, respectively, hydrogen, fluorine, an alkyl group with 1 to 20 of carbon, which is allowed to be replaced with a hydroxyl group, a fluoroalkyl group, an alkenyl group and a fluoroalkenyl group, or a phenyl group, a fluorophenyl group, a sulfon group, an amino group, a nitro group and a cyano group with part or all thereof being allowed to be linked with one another to form rings;
- and R1 to R6 are allowed to be the same with or different from one another.
Dependencies are inferred from the claim text.