Nippon Kodoshi Corporation

Naoki Fujimoto

Atsushi Igawa

Norihiro Wada

Takumi Ichimura

Masahiko Ueta

Gaku Matsuoka

Kosuke Tanaka

Akiyoshi Takeuchi

A separator for an aluminum electrolytic capacitor. The separator makes it possible to use inexpensive fibers and has excellent impedance characteristics and short-circuit resistance performance. When the separator for an aluminum electrolytic capacitor is interposed between a positive electrode and a negative electrode of an aluminum electrolytic capacitor and 500 V are applied during separator dielectric breakdown testing, the separator for an aluminum electrolytic capacitor has a short-circuit rate of no more than 10%.

Separator for aluminum electrolytic capacitor, and aluminum electrolytic capacitor

A separator for an electrochemical element suitable extends the service life of an electrochemical element under high temperature conditions. This separator for an electrochemical element is disposed between a pair of electrodes and is for separating the two electrodes from each other and retaining an electrolytic solution, wherein the separator contains a cellulose-based fiber, and the limiting viscosity of the separator as measured by the measurement method specified in JIS P 8215 is in a range of 150-500 ml/g.

Separator for electrochemical element and electrochemical element

Provided is a separator having excellent tearing strength, denseness, and impedance performance, and an aluminum electrolytic capacitor provided with the separator. The present invention constitutes a separator including beatable regenerated cellulose fibers, the separator having a CSF value X[ml] and tear index Y[mN&#xb7;m/g] within the ranges satisfying the following formulae. The present invention also constitutes an aluminum electrolytic capacitor in which at least one of the separators is used, the capacitor feeing formed by interposing the separator between an anode and a cathode.&#x2264;X&#x2264;&#x2003;&#x2003;Formula&#x2264;Y&#x2264;&#x2003;&#x2003;Formula&#x2003;&#x2003;Formula

Separator and aluminum electrolytic capacitor

A separator for an electric double-layer capacitor is provided having a double-layer structure made of a fibrous layer A obtained by papermaking using a Fourdrinier net or a tanmo net, and a fibrous layer B obtained by papermaking using a cylinder net. The fibrous layer A is a layer that is refined until a CSF value decreases once to 0 ml (lower limit), and further refined until it turns to rise to 10 to 600 ml, the fibrous layer B is a layer that is refined until a CSF value of 700 to 0 ml, and the fibrous layer A and the fibrous layer B contain 70% by mass or more refinable, regenerated cellulose fibers. The density of the entire double-layer structure is 0.25 to 0.65 g/cm, and the thickness of the same is 10 to 150 &#x3bc;m. This allows provision of a separator for an electric double-layer capacitor having excellent tensile strength and tear strength, provision of a degree of mechanical strength such that the separator does not break in a manufacturing process of a wound or a stacked type electric double-layer capacitor, and improvement of productivity without adversely affecting internal resistance and leakage current properties of the capacitor as an energy storage device.

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Kochi, Japan

Naoki Fujimoto