CARBON MATERIAL FOR POWER STORAGE DEVICE, AND POWER STORAGE DEVICE

• Main Authors: KUME TETSUYA, OIKAWA KOJI
• Format: Patent
• Language: English; Japanese
• Published: 18.05.2017
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; ELECTRICITY

PROBLEM TO BE SOLVED: To provide a carbon material which enables the materialization of a power storage device with a small internal resistance; and a power storage device arranged by use of such a carbon material.SOLUTION: A carbon material is used as a material for polarizable electrodes 2a and 2b that a power storage device (an electric double layer capacitor) 1 includes. The carbon material is 1 μm or more and less than 4 μm in a 50% particle diameter Dof a particle size cumulative curve, which is obtained by measuring a particle size distribution by a light scattering method, and it is less than 0.35 in the standard deviation σ of particle diameters obtained by measurement of the particle size distribution. A power storage device is arranged with the carbon material.SELECTED DRAWING: Figure 1 【課題】内部抵抗が小さな蓄電デバイスを実現可能とする炭素材料及び該炭素材料を使用した蓄電デバイスを提供する。【解決手段】蓄電デバイス（電気二重層キャパシタ）１が含む分極性電極２ａ、２ｂの材料として使用する炭素材料であって、光散乱法で粒度分布を測定することによって得られる粒度累積曲線の５０％粒径Ｄ50が１μｍ以上４μｍ未満であり、上記粒度分布の測定によって得られる粒径の標準偏差σが０．３５未満である炭素材料を使用し、蓄電デバイスを構成する。【選択図】図１