▎ 摘　　要

NOVELTY - An iron selenide-ferric oxide nanotube/graphene aerogel composite cathode material comprises a wrinkled structure, and iron selenide-ferric oxide nanotubes which are coated by a graphene aerogel network. The iron selenide-ferric oxide nanotubes has diameter of 400-520 nm, length of 1.9-2.4 mum and wall thickness of 25-35 nm. The iron selenide-ferric oxide nanotubes comprises 12.35-20.49 %mass selenium, 13.42-23.55 %mass iron, 26.37-34.80 %mass oxygen, and 34.28-39.16 %mass carbon. The BET specific surface area is 30.26-47.69 m2g-1. USE - Iron selenide-ferric oxide nanotube/graphene aerogel composite cathode material for use as cathode material of CR2032 button-type lithium ion battery (claimed). ADVANTAGE - The composite material has long cycle life, high specific capacity, wide raw material source, and simple operation. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: 1.a preparation method of iron selenide-ferric oxide nanotube/graphene aerogel composite cathode material, which involves (1) adding iron salt and fumaric acid to a container filled with de-ionized water, and stirring for 0.5-2 hours at a rotating speed of 600-1000 rpm until all dissolved, where the concentration of iron salt in de-ionized water is 9.25-13.86 g/L and the mass ratio of the iron salt to fumaric acid is 1:(1-1.8), (2) transferring the mixed aqueous solution in the step (1) into a high pressure reactor, placing in oven, hydrothermally treating at 70-90degrees Celsius for 12-24 hours, naturally cooling to room temperature, centrifuging and separating at a rotating speed of 4000-7000 rpm, and washing 3 times with ethanol and deionized water, vacuum drying the precipitate at 80-100degrees Celsius to obtain an iron-based metal organic framework nano-rod, (3) ultrasonically dispersing the product obtained in the step (2) in 1.5-2.5 mg/ml graphene oxide solution for 1-2 hours, placing in a freeze dryer, and keeping at -80degreesC for 2-3 days to obtain iron-based metal organic framework nanorods coated by graphene oxide, and (4) placing the product obtained in the step (3) and selenium powder according to the mass ratio of 1:(3-5) respectively in downstream and upstream of porcelain boat, passing mixed gas of hydrogen and argon in the tubular furnace at a heating speed of 2-3degreesC/minute, keeping for 1-2 hours at 300degreesC, continuously heating to 500degreesC, keeping the temperature for 1-2 hours, and naturally cooling to room temperature to obtain a final product; and 2.an application of iron selenide-ferric oxide nanotube/graphene aerogel composite cathode material as cathode material of lithium ion battery.