▎ 摘　　要

NOVELTY - Composite comprises: few-layered graphene comprising mono-, bi- and n-layered graphene, where n is 3-6; and nanoparticles of a material comprising lithium-ion cathode active materials for a lithium-ion battery or lithium-ion anode active materials for a lithium-ion battery, where the surface of a the nanoparticle is coupled to and conformally coated with the few-layered graphene, providing the graphene is not graphene oxide and is not reduced graphene oxide. USE - The composite is useful in lithium-ion battery. ADVANTAGE - The composite is robust and binder-free possesses significantly improved packing density with individually dispersed nano-LMO primary particles and graphene nanoflakes and exhibits excellent power performance during both charge! discharge cycles up to 20 degrees C at room temperature. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) lithium-ion battery cathode composite material comprising few-layered graphene and LMO nanoparticles; (2) preparing lithium-ion battery electrode, comprising exfoliating a graphene source material with a medium comprising an organic solvent at least partially miscible with water and a cellulosic polymer at least partially soluble in the organic solvent, contacting the exfoliated graphene-cellulosic polymer composition with a composition comprising a nanoparticulate material of cathode active materials or anode active materials, and a hydrophobic fluid component and depositing the compositions on a lithium-ion battery electrode substrate; and (3) method of using a graphene-cellulosic polymer composition to modulate lithium-ion battery cathode performance comprising contacting an exfoliated graphene-cellulosic polymer composition with a composition comprising nanoparticulate LMO and a hydrophobic fluid component, depositing the compositions on a lithium-ion battery cathode substrate and annealing the deposited compositions to conformally coat the LMO nanoparticle with at least one of the graphene and an annealation product of the cellulosic polymer, thus modulating at least one of the packing density of the LMO nanoparticles and manganese ion dissolution from the nanoparticles.