Graphene dispersion, process for producing same, process for producing particles of graphene/active material composite, and process for producing electrode paste

The purpose of the present invention is to provide graphene in a form that renders the graphene highly dispersible and enables the graphene to retain high electroconductivity and ionic conductivity when used as a raw material for producing electrode materials. The present invention is a graphene dispersion which comprises an organic solvent and graphene dispersed therein, wherein, when the median diameter of the graphene determined through an examination by laser diffraction/scattering particle size distribution analysis is expressed by D (µm) and the average plane-direction graphene size determined from an arithmetic mean of the largest major-axis length and smallest minor-axis length of the graphene observed with a laser microscope is expressed by S (µm), then both 0.5 µm≤S≤15 µm and 1.0≤D/S≤3.0 are satisfied.