▎ 摘　　要

Development of effective hybridization of carbonaceous materials and conductive polymers as electrode material is anticipated to promote the properties of electrochemical capacitors (ECs) but has remained a challenge. In this study, carboxylated nanodiamonds (cNDs) were utilized as both spacers and tougheners to successfully synthesize a ternary composite of cNDs/reduced graphene oxide (rGO)@PANI, exhibiting a hierarchical three-dimensional structure constituting both nanoclusters and finer nanorods features. The obtained cNDs/rGO@PANI composite demonstrates high rate capability and good cycle stability, suggesting the ternary composite is a promising electrode material for high-performance ECs.