▎ 摘　　要

NOVELTY - The hydrothermal synthesis of metal oxide/ graphene nanocomposite, involves (i) uniformly dispersing graphene oxide or partially reduced graphene in organic solvent of metal salt, dripping deionized water, stirring to obtain a homogeneous dispersion of graphene and metal salt, (ii) transferring the dispersion to a hydrothermal reaction kettle, performing hydrothermal reaction, cooling naturally, and obtaining hydrothermal product of metal oxide/graphene nanocomposite, (iii) suction-filtering, washing and drying to obtain metal oxide/graphene nanocomposite. USE - Hydrothermal synthesis of metal oxide/graphene nanocomposite used in lithium battery and supercapacitor (all claimed). ADVANTAGE - The metal oxide/ graphene nanocomposite is prepared by a simple method at low cost under low water temperature condition, while ensuring large-scale production safety. The metal oxide/ graphene nanocomposite achieves high specific capacity, super high rate performance and high cycle stability of the electrochemical properties. DETAILED DESCRIPTION - The hydrothermal synthesis of metal oxide/ graphene nanocomposite, involves (i) uniformly dispersing graphene oxide or partially reduced graphene in an organic solvent of metal salt, dripping deionized water, stirring for 5-120 minutes to obtain a homogeneous dispersion of graphene and metal salt, (ii) transferring the dispersion to a hydrothermal reaction kettle, and performing hydrothermal reaction at 80-120 degrees C for 0.1-72 hours, cooling naturally, and obtaining hydrothermal product of metal oxide/graphene nanocomposite, (iii) filtering the obtained product through suction, washing and drying to obtain metal oxide/graphene nanocomposite.