Abstract: The present invention provides an electric double layer capacitor having a high withstanding voltage, less deterioration, and excellent long-term reliability, especially an effect of suppressing expansion. The present invention relates to an electrolyte solution for an electric double layer capacitor. The solution comprises an electrolyte-salt-dissolving solvent (I) and an electrolyte salt (II). The electrolyte-salt-dissolving solvent (I) contains a fluorine-containing chain ether and a nitrile compound.

Abstract: An object of the present invention is to provide an electric double layer capacitor which has a high withstand voltage, and is resistant to degradation and excellent in long term reliability. Disclosed is an electrolytic solution for an electric double layer capacitor including a solvent (I) for dissolving an electrolyte salt and an electrolyte salt (II), wherein the solvent (I) for dissolving an electrolyte salt includes a sulfolane compound and a fluorine-containing chain ether. Also disclosed is an electric double layer capacitor using the electrolytic solution.

Abstract: The present invention provides an electric double layer capacitor that has a high withstand voltage, is more resistant to degradation, and also has good cycle characteristics. The present invention relates to an electrolytic solution for an electric double layer capacitor, comprising: (I) a solvent for dissolving an electrolyte salt; and (II) an electrolyte salt, wherein the solvent (I) for dissolving an electrolyte salt includes propylene carbonate and at least one selected from the group consisting of a fluorine-containing chain carbonate and a fluorine-containing chain ether. The present invention also relates to an electric double layer capacitor comprising the electrolytic solution.

Abstract: The present invention provides an electric double layer capacitor having a high withstanding voltage, less deterioration, and excellent long-term reliability, especially an effect of suppressing expansion. The present invention relates to an electrolyte solution for an electric double layer capacitor. The solution comprises an electrolyte-salt-dissolving solvent (I) and an electrolyte salt (II). The electrolyte-salt-dissolving solvent (I) contains a fluorine-containing chain ether and a nitrile compound.

Abstract: An object of the present invention is to provide an electric double layer capacitor which has a high withstand voltage, and is resistant to degradation and excellent in long term reliability. Disclosed is an electrolytic solution for an electric double layer capacitor including a solvent (I) for dissolving an electrolyte salt and an electrolyte salt (II), wherein the solvent (I) for dissolving an electrolyte salt includes a sulfolane compound and a fluorine-containing chain ether. Also disclosed is an electric double layer capacitor using the electrolytic solution.

Abstract: The present invention provides a binder composition for an electrode. The binder composition includes PTFE particles as primary particles uniformly dispersed in an organic solvent at a high concentration. The present invention relates to a binder composition for an electrode, comprising an organosol composition containing PTFE particles (A), a polymer (B), and a fluorine-free organic solvent (C); and no electrode active material (J), wherein the polymer (B) is soluble in the fluorine-free organic solvent (C).

Abstract: An electric double layer capacitor includes a pair of collectors, a separator, a conductive coating film, a polarizable electrode, and an electrolyte solution. The separator is arranged between the collectors. The conductive coating film covers a surface of at least one of the collectors facing the separator. The polarizable electrode is formed as to be in contact with at least a surface of the conductive coating film facing the separator. Preferably, electrolyte solution has a fluorine-containing organic solvent, and is impregnated into the polarizable electrode. Preferably, the capacitor enables an operating voltage of 3.5 V or higher.

Abstract: The present invention provides an electric double layer capacitor that has a high withstand voltage, is more resistant to degradation, and also has good cycle characteristics. The present invention relates to an electrolytic solution for an electric double layer capacitor, comprising: (I) a solvent for dissolving an electrolyte salt; and (II) an electrolyte salt, wherein the solvent (I) for dissolving an electrolyte salt includes propylene carbonate and at least one selected from the group consisting of a fluorine-containing chain carbonate and a fluorine-containing chain ether. The present invention also relates to an electric double layer capacitor comprising the electrolytic solution.