▎ 摘　　要

NOVELTY - A negative electrode active material is a composite in which graphene quantum dots are bonded to the surface of a metal oxide having a microspherical structure. USE - Negative electrode active material is used for binder-free electrochemical cell i.e. lithium-ion secondary battery (all claimed) for mobile phones, laptops, cameras, and electric vehicles. Can also be used for water electrolysis electrode, supercapacitor, and solar cells electrode. ADVANTAGE - The negative electrode active material has high performance, and is obtained by simple, economical and efficient process, because it is a self-assembly hydrothermal synthesis method. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for manufacture of the negative electrode active material.