▎ 摘　　要

NOVELTY - A graphene heat-dissipation coating comprises a bottom graphene heat-dissipation coating and a surface graphene heat-dissipation coating. The bottom graphene heat-dissipation coating comprises 30-65 wt.% polyester resin, 0.5-10 wt.% modified graphene oxide powder, 1-5 wt.% coupling agent, 5-15 wt.% silicon carbide, 0.5-5 wt.% rheological additive, 0.1-2 wt.% dispersant and 10-45 wt.% solvent. The surface graphene heat-dissipation coating comprises 30-65 wt.% epoxy resin, 0.5-10 wt.% modified graphene oxide powder, 1-5 wt.% coupling agent, 5-15 wt.% silicon carbide, 0.5-5 wt.% rheological additive, 0.1-2 wt.% dispersant and 10-45 wt.% solvent. USE - Coating is used for preparing graphene heat-dissipation material (all claimed) for aluminum electrolytic capacitor. ADVANTAGE - The coating has excellent heat-dissipation performance and stability. The heat-dissipation capacity of the aluminum electrolytic capacitor is improved after applying the heat-dissipation coating. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of graphene heat-dissipation coating, which involves adding modified graphene oxide powder to polyester resin, uniformly dispersing, obtaining a solution (S1), uniformly mixing rheological additive, dispersant and solvent, obtaining a solution (S2), adding the solution (S1) to the solution (S2), mixing, sand- or ball-milling, obtaining a solution (S3), adding silicon carbide and coupling agent to the solution (S3), uniformly mixing, sand- or ball-milling, obtaining bottom graphene heat-dissipation coating, adding modified graphene oxide powder to epoxy resin, uniformly dispersing, obtaining a solution (S4), uniformly mixing rheological additive, dispersant and solvent, obtaining a solution (S5), adding the solution (S4) to the solution (S5), uniformly mixing, sand- or ball-milling, obtaining solution (S6), adding silicon carbide and coupling agent to the solution (S6), uniformly mixing, sand- or ball-milling, and obtaining surface graphene heat-dissipation coating; and (2) preparation of graphene heat-dissipation material which involves spraying the bottom graphene heat-dissipation coating on the inner and outer layers of an aluminum electrolytic capacitor with thickness of 40 mu m or less, baking, spraying the surface graphene heat-dissipation coating on the inner and outer layers of the baked aluminum electrolytic capacitor, respectively with thickness of 20 mu m or less, and baking.