Conductive material dispersion and use thereof

A conductive material dispersion containing: a dispersant satisfying the following requirements (1) and (2); a carbon-based conductive material (C); and a medium (D) containing at least water. (1) A polymer (A) having a weight average molecular weight of 5,000 to 360,000, said polymer (A) having at least one type selected from the group consisting of a nitrile group-containing structural unit, a carboxyl group-containing structural unit, a hydroxyl group-containing structural unit, and a heterocyclic ring-containing structural unit. And (2) a component (B) other than a polymer derived from a starting material of the polymer (A), the content of the component (B) being 2 mass% or less based on the total mass of the dispersant. 一种导电材分散体，含有：分散剂，满足下述(1)及(2)；碳系导电材(C)；以及介质(D)，至少含有水。(1)含有聚合体(A)，所述聚合体(A)具有选自由含腈基的结构单元、含羧基的结构单元、含羟基的结构单元、及含杂环的结构单元所组成的群组中的一种以上，重量平均分子量为5,000以上且360,000以下。(2)包含源自所述聚合体(A)的原料的聚合体以外的成分(B)，所述成分(B)的含量以分散剂的总质量为基准而为2质量％以下。