Method for preparing graphene/ternary material composite for use in lithium ion batteries and product thereof

A graphene/ternary material composite for use in lithium ion batteries, wherein the graphene/ternary material composite has an α-NaFeO2-type layered structure and a space group of R3m, with R≥1.2 where R=I003/I004, wherein I003 and I 004 are the intensities of the 003 and 004 reflections planes in x-ray diffraction pattern, respectively;

• and
• wherein the graphene/ternary material composite is prepared by a method comprising the steps of:
• (a) mixing a ternary material with a graphene oxide powder in an organic solvent to form a mixed dispersion;
• (b) adding a reducing agent to the mixed dispersion from step (a), and carrying out a reduction reaction at a reduction temperature of 80-160° C. while stirring, to obtain a reduction reaction mixture after a reduction time of 60-240 min;
• and
• (c) evaporating the solvent from the reduction reaction mixture from step (b) while stirring, and drying and then annealing the mixture at a temperature of 150-350° C. in an inert atmosphere to obtain a graphene/ternary material composite having a three-dimensional network structure.