Preparation method and application of three-dimensional dendritic metal-carbon nanofibers
A technology of carbon nanofibers and dendrites, which is applied in the field of preparation of three-dimensional dendritic metal-carbon nanofibers, and achieves the effects of simple preparation method, good rate discharge performance and low price
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Embodiment 1
[0018] (1) metal salts of iron acetylacetonate, nickel acetylacetonate, cobalt acetylacetonate (Co(acac) 2 ) and polyacrylonitrile (PAN) were mixed at 55°C for 24h at a mass ratio of 1:5, and three metal salts were reacted as separate raw materials in this example;
[0019] (2) Using the electrospinning method, the mixture obtained in step (1) is packed into a syringe, the needle is kept at a high voltage of 13.5KV, and the mixture is advanced at 1.5ml / h, and collected by a rotating collector with a rotating speed of 2000 rpm Iron-carbon (Fe / CNFs), nickel-carbon (Ni / CNFs), cobalt-carbon nanofiber (Co / CNFs) precursors;
[0020] (3) Place the metal-carbon nanofiber precursor obtained in step (2) in air at 290°C for 2h, then calcinate in stages in nitrogen, raise the temperature to 300°C at a rate of 2° / min, calcinate for 2h, and then Raise the temperature to 800°C at a rate of 5°C / min, and calcine for 2 hours. The metal raw materials in it can induce the growth of nano-branches...
Embodiment 2
[0027] (1) metal salts of iron acetylacetonate, nickel acetylacetonate, cobalt acetylacetonate (Co(acac) 2 ) and polyacrylonitrile (PAN) were mixed at 55°C for 24h at a mass ratio of 3:5, and three metal salts were reacted as separate raw materials in this example;
[0028] (2) Using the electrospinning method, the mixture obtained in step (1) is packed into a syringe, the needle is kept at a high voltage of 13.5KV, and the mixture is advanced at 1.5ml / h, and collected by a rotating collector with a rotating speed of 2000 rpm Iron-carbon (Fe / CNFs), nickel-carbon (Ni / CNFs), cobalt-carbon nanofiber (Co / CNFs) precursors;
[0029] (3) Place the metal-carbon nanofiber precursor obtained in step (2) in air at 290°C for 2h, then calcinate in stages in nitrogen, raise the temperature to 300°C at a rate of 2° / min, calcinate for 2h, and then Raise the temperature to 800°C at a rate of 5°C / min, and calcine for 2 hours. The metal raw materials in it can induce the growth of nano-branches...
Embodiment 3
[0031] (1) metal salts of iron acetylacetonate, nickel acetylacetonate, cobalt acetylacetonate (Co(acac) 2 ) and polyacrylonitrile (PAN) were mixed at 55°C for 24h at a mass ratio of 1:5, and three metal salts were reacted as separate raw materials in this example;
[0032] (2) Using the electrospinning method, the mixture obtained in step (1) is packed into a syringe, the needle is kept at a high voltage of 13.5KV, and the mixture is advanced at 1.5ml / h, and collected by a rotating collector with a rotating speed of 2000 rpm Iron-carbon (Fe / CNFs), nickel-carbon (Ni / CNFs), cobalt-carbon nanofiber (Co / CNFs) precursors;
[0033] (3) Place the metal-carbon nanofiber precursor obtained in step (2) in air at 290°C for 2h, then calcinate in stages in nitrogen, raise the temperature to 300°C at a rate of 2° / min, calcinate for 2h, and then Raise the temperature to 900°C at a rate of 5°C / min, and calcine for 2h. The metal raw materials in it can induce the growth of nano-branches on t...
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