▎ 摘　　要

NOVELTY - Preparing tin oxide-titanium dioxide doped reduced graphene oxide lithium-ion battery cathode material involves ball-milling, crushing freeze-dried graphene oxide in planetary ball mill at rotating speed of 30-50 revolutions per minute for 5-6 hours, taking graphene oxide, dispersing uniformly the graphene oxide in the organic solvent under the action of magnetic stirring, performing ultrasonic dispersion to obtain a uniformly dispersed graphene oxide suspension, where the mass ratio of graphene oxide and organic solvent is (0.05-0.5) g:20 ml, adding slowly the composite metal source into the graphene oxide suspension. USE - Method for preparing tin oxide-titanium dioxide doped reduced graphene oxide lithium-ion battery cathode material used for preparing assembly of battery (claimed). ADVANTAGE - The prepared cathode material has excellent electrochemical performance, high specific capacity, excellent cycle stability, and excellent rate performance. DETAILED DESCRIPTION - Preparing tin oxide-titanium dioxide doped reduced graphene oxide lithium-ion battery cathode material involves ball-milling, crushing freeze-dried graphene oxide in planetary ball mill at rotating speed of 30-50 revolutions per minute for 5-6 hours, taking graphene oxide, dispersing uniformly the graphene oxide in the organic solvent under the action of magnetic stirring, performing ultrasonic dispersion to obtain a uniformly dispersed graphene oxide suspension, where the mass ratio of graphene oxide and organic solvent is (0.05-0.5) g:20 ml, adding slowly the composite metal source into the graphene oxide suspension, mixing fully, reacting hydrothermally at 70-90℃ for 12 hours to obtain a gray-black suspension, where the mass ratio of the composite metal source to graphene oxide is (3-30):1, washing the sample with water, centrifuging, filtering with suction, freezing, and drying at low temperature for 48 hours to obtain a material is tin oxide-titanium dioxide doped reduced graphene oxide lithium-ion battery cathode material. An INDEPENDENT CLAIM is included for an application method of tin oxide-titanium dioxide doped reduced graphene oxide lithium-ion battery cathode material for battery assembly, which involves: (a)mixing tin oxide-titanium dioxide doped reduced graphene oxide lithium-ion battery cathode material, Ketjen black and polyvinylidene fluoride in a mass ratio of 8:1:1 to obtain a first mixed powder;(b)mixing the obtained first mixed powder with the solvent dimethylformamide with specific mass ratio of 1 g:20 ml;(c)grinding fully the slurry;(d) coating the slurry on copper foil;(e)performing vacuum-drying at 100℃ for 12 hours to obtain an electrode sheet with diameter of 14 mm, and assembling No.2025 coin cell in a glove box in an argon environment. DESCRIPTION OF DRAWING(S) - The drawing shows an X-ray diffraction pattern of the prepared tin oxide-titanium dioxide doped reduced graphene oxide lithium-ion battery cathode material.