Carbon nano capsule and preparation method thereof
A carbon nano and capsule technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of easy aggregation of nanoparticles, etc., and achieve easy scale-up production, high operational stability and high feasibility , The effect of excellent charge-discharge cycle performance
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Embodiment 1
[0029] Prepare dimethylacetamide and H at a volume ratio of 1:1 2 O mixed solvent. Using tin tetrachloride pentahydrate and furfural formaldehyde as raw materials, furfural formaldehyde and tin tetrachloride pentahydrate are sequentially added to the above mixed solvent in a certain proportion, and stirred until fully dissolved to form a uniform mixed solution. Wherein, the molar ratio of metal in furfural formaldehyde and tin tetrachloride pentahydrate is 5:1. Afterwards, the mixed solution was reacted for 20 h at a solvothermal reaction temperature of 140° C., and suction filtration was performed after the reaction was completed. The obtained filter cake was dried at 80° C. to obtain a dried product. Finally, put the dried object in a tube furnace protected by a nitrogen atmosphere, and heat-treat it at 650°C for 2 hours to obtain the SnO-containing 2 Nanoparticles of carbon nanocapsules. Using this material as the anode material of lithium-ion batteries, the reversible ...
Embodiment 2
[0031] Prepare dimethylformamide and H at a volume ratio of 2:1 2 O mixed solvent. Using chromium nitrate nonahydrate and furan formaldehyde as raw materials, furfur formaldehyde and chromium nitrate nonahydrate are sequentially added to the above mixed solvent in a certain proportion, and stirred until fully dissolved to form a uniform mixed solution. Wherein, the molar ratio of the metal in furan formaldehyde and chromium nitrate nonahydrate is 12:1. Afterwards, the mixed solution was reacted for 10 h at a solvothermal reaction temperature of 160° C., and suction filtration was performed after the reaction was completed. The obtained filter cake was dried at 100° C. to obtain a dried product. Finally, place the dried object in a tube furnace protected by an argon atmosphere, and heat-treat it at 900°C for 1 hour to obtain the Cr-containing 2 o 3 Carbon nanocapsules of ultrafine nanoparticles. The material is used as the negative electrode material of the lithium ion bat...
Embodiment 3
[0033] Prepare formamide and H at a volume ratio of 0.5:1 2 O mixed solvent. Using manganese acetate and furan formaldehyde as raw materials, furan formaldehyde and manganese acetate are sequentially added to the above mixed solvent in a certain proportion, and stirred until fully dissolved to form a uniform mixed solution. Wherein, the molar ratio of metal in furan formaldehyde and manganese acetate is 7:1. Afterwards, the mixed solution was reacted for 5 hours at a solvothermal reaction temperature of 150° C., and suction filtration was performed after the reaction was completed. The obtained filter cake was dried at 60° C. to obtain a dried product. Finally, put the dried object in a tube furnace protected by a nitrogen atmosphere, and heat-treat it at 600°C for 1.5h to obtain the Mn-containing 3 o 4 Carbon nanocapsules of ultrafine nanoparticles. The material is used as the negative electrode material of lithium-ion battery, and the reversible capacity of 477 mAh / g ca...
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