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Method for producing conductive carbon, method for producing electrode material containing carbon, method for producing electrode using this electrode material, and method for producing electricity storage device provided with this electrode
Method for producing conductive carbon, method for producing electrode material containing carbon, method for producing electrode using this electrode material, and method for producing electricity storage device provided with this electrode
Provided is conductive carbon which gives an electric storage device having a high energy density. This conductive carbon is characterized in having a hydrophilic solid phase component, where a crystallite size La that does not include a twist in a graphene surface direction and a crystallite size Leq that includes a twist in a graphene surface direction, which are calculated from a Raman spectrum of the hydrophilic solid phase component, satisfy the following relationships: 1.3 nm≦La≦1.5 nm, and 1.5 nm≦Leq≦2.3 nm, and 1.0≦Leq/La≦1.55. When performing a rolling treatment on an active layer including an active particle and this conductive carbon formed on a current collector 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-like 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.
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