▎ 摘　　要

NOVELTY - Graphene dispersion comprises graphene dispersed in a dispersion medium, where in the graphene contained in the dispersion, the area percentage of graphene having a size of 500 nm to 1 mu m in the plane direction is at least 30%, and the area percentage of graphene having a size of 10-50 mu m in the plane direction is at least 30%. USE - The dispersion is used in an electrode paste for an electrode for a secondary battery (all claimed). The dispersion is used as a conductive additive agent for a secondary battery electrode, and used in an antistatic coating, a transparent conductive film, or a graphene self-supporting film. ADVANTAGE - The graphene dispersion is in a stable dispersion state and forms strong conductive paths. The electrode has strong conductive path. The dispersion ensures high dispersibility at the time of use, maintains high conductivity for a long period of time, uniformly disperses in a matrix and forms an efficient conductive path over the entire electrode. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) an electrode paste comprising the above-mentioned graphene dispersion and a positive electrode active material; (2) a method for producing the graphene dispersion, involving mixing a first graphene material having an area average value of 500 nm to 5 mu m with a second graphene material having an area average value of 10-50 mu m in the surface direction; (3) a graphene powder in which the area percentage of graphene having a size of 500 nm to 5 mu m is 30% or more in the plane direction, and the area percentage of graphene having a size of 10-50 mu m in the plane direction is 30% or more; (4) a secondary battery electrode containing active material particles for secondary battery and graphene, when the median diameter of the active material particles for a secondary battery is Da, the area percentage of graphene having a size of 0.05-0.5 Da is 30% or more in the plane direction, and the area percentage of graphene having a size of 1-5 Da is 30% or more in the plane direction; and (5) a method for manufacturing the electrode, involving mixing active material particles for a secondary battery and a graphene material, where when the median diameter of the active material particles for a secondary battery is Da, (i) active material particles for a secondary battery, (ii) a first graphene material having an area average value in the plane direction of 0.05-0.5 Da, (iii) a second graphene material having an area average value in the plane direction of 1-5 Da, are prepared, and (iv) the active material particles for a secondary battery, the first graphene material, and the second graphene material are mixed simultaneously or stepwise.