Carbon material and electricity storage device

• Main Authors: HIGAONNA YASUYUKI, MATSUMURA YUKO, KUME TETSUYA
• Format: Patent
• Language: English
• Published: 17.11.2015
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; CHEMISTRY; COMPOUNDS THEREOF; CRUSHING, PULVERISING, OR DISINTEGRATING; CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; ELECTRICITY; INORGANIC CHEMISTRY; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; METALLURGY; MILLING GRAIN; NANOTECHNOLOGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; PREPARATORY TREATMENT OF GRAIN FOR MILLING; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; TRANSPORTING

Achieved is an electricity storage device having a low internal resistance and a high energy density. In a pore distribution, which is obtained for a carbon material using a BJH method and is plotted on a graph with a pore diameter D on the abscissa and a derivative V/ D of a pore volume per unit mass or unit volume with respect to the pore diameter D on the ordinate, a ratio M1/M2 of the maximum value M1 of the derivative V/ D in an interval of the pore diameter D from 10 to 100 nm with respect to the maximum value M2 of the derivative V/ D in an interval of the pore diameter D from 2 to 10 nm is 1.5 or more.