▎ 摘　　要

NOVELTY - A nanocomposite material comprises a metal oxide bonded to a graphene layer. USE - In energy storage device such as electrochemical device and lithium ion battery, and for making lithium ion battery electrode (claimed). ADVANTAGE - The graphene layer of the nanocomposite material has a carbon to oxygen ratio of 15-500:1 (preferably 20-500:1); and has a surface area of 400-2630 (preferably 600-2630) m2/g. The nanocomposite material exhibits a specific capacity at least twice that of a titania material without the graphene layer at a charge/discharge rate greater than 10C; and improves high-rate performance, electrochemical impedance spectroscopy measurements on rutile titanium dioxide (TiO2)-functionalized graphene sheets (FGS) hybrid materials were performed after cycles. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a method of forming a nanocomposite material involving providing graphene in a first suspension; dispersing the graphene with a surfactant; adding a metal oxide precursor to the dispersed graphene to form a second suspension; and precipitating the metal oxide from the second suspension onto at least one surface of the dispersed graphene to form a nanocomposite material comprising at least one metal oxide bonded to at least one graphene layer; (2) an energy storage device comprising a nanocomposite material having an active metal compound and at least one graphene layer arranged in a nanoarchitecture; and (3) a lithium ion battery electrode comprising at least one graphene layer bonded to titania to form a nanocomposite material, where the graphene layer has a carbon to oxygen ratio of 15-500:1, and a surface area of 400-2630 m2/g, and the nanocomposite material has a specific capacity at least twice that of a titania material without the graphene layer at a charge/discharge rate greater than 10C.