▎ 摘　　要

NOVELTY - Preparing copper sulfide/graphene nanocomposite comprises (i) modifying surface of graphene in the presence of cetyltrimethylammonium bromide and water as solvent, and ultrasonically peeling to obtain single-layer or few-layer graphene dispersion, (b) adding copper precursor into the obtained single-layer or few-layer graphene dispersion and reacting to obtain copper(II) modified graphene dispersion, and (c) adding sulfur precursor and the surface ligand into the obtained copper(II) modified graphene dispersion and performing solid-liquid separation. USE - The nanocomposite is useful in the field of microwave absorption (claimed). ADVANTAGE - The method is simple and easy to implement, low in cost, and capable of being produced in large quantities. The nanocomposite: has high microwave absorption performance under low filling rate and thin thickness. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) An INDEPENDENT CLAIM is also included for copper sulfide/graphene nanocomposite obtained by above method; and (2) use of nanocomposite in the field of microwave absorption.