CONDUCTIVE CARBON, ELECTRODE MATERIAL INCLUDING SAID CARBON, ELECTRODE IN WHICH SAID ELECTRODE MATERIAL IS USED, AND ELECTRIC STORAGE DEVICE PROVIDED WITH SAID ELECTRODE

摘要

Provided is a conductive carbon having a high energy density and conducting electricity to an electric storage device. This conductive carbon is characterized in including a hydrophilic solid phase component, a crystallite size (La) not including a twist in the graphene surface direction and a crystallite size (Leq) including a twist in the graphene surface direction satisfying the expressions 1.3nm≤La≤1.5nm, 1.5nm≤Leq≤2.3nm, and 1.0≤Leq/La≤1.55, the crystallite size (La) and the crystallite size (Leq) being calculated from a Raman spectrum of the hydrophilic solid phase component. When performing a rolling treatment on an active layer including active particles formed on a current collector and this conductive carbon during manufacture of an electrode of an electric storage device, the pressure resulting from the rolling treatment causes this conductive carbon to spread in a paste form and increase in density while covering the surface of the active particles, the conductive carbon being pressed into gaps formed between adjacent active particles and filling the gaps. As a result, the amount of active material per unit volume in the electrode obtained after the rolling treatment increases, and the electrode density increases.