A kind of composite cathode material and its preparation method and application in zinc ion battery
A composite cathode material, composite carbon technology, applied in nanotechnology for materials and surface science, positive electrode, battery electrode, etc., can solve the problem of poor cycle stability and rate performance, low specific capacity, insufficient conductivity, etc. problem, to achieve the effect of enhancing specific capacity and electronic conductivity, improving specific capacity and high capacity
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Embodiment 1
[0097] This embodiment provides a composite positive electrode material, which includes: a sulfur-doped three-dimensional network structure conductive polymer / graphene / carbon nanotube composite carbon material, and tetrasulfide tetrasulfide loaded on the surface of the composite carbon material Three vanadium nanoparticles; the surface includes at least one of the outer surface of conductive polymer particles, the sheet surface and interlayer of graphene, and the outer surface of carbon nanotubes; the vanadium tetrasulfide and composite carbon material The mass ratio is 5:1, the carbon nanotube length is 300nm, and the tube diameter is 10nm.
[0098] The preparation method of the positive electrode material of the method comprises the following steps:
[0099] (1) Preparation of sulfur-doped three-dimensional network structure conductive polymer / graphene / carbon nanotube composite carbon material
[0100] a) adding an appropriate amount of hexadecyltrimethylammonium bromide to...
Embodiment 2
[0109] This embodiment provides a composite positive electrode material, which includes: a sulfur-doped three-dimensional network structure conductive polymer / graphene / carbon nanotube composite carbon material, and tetrasulfide tetrasulfide loaded on the surface of the composite carbon material Three vanadium nanoparticles; the surface includes at least one of the outer surface of conductive polymer particles, the sheet surface and interlayer of graphene, and the outer surface of carbon nanotubes; the vanadium tetrasulfide and composite carbon material The mass ratio is 10:1, the carbon nanotube length is 500nm, and the tube diameter is 8nm.
[0110] The preparation method of the positive electrode material of the method comprises the following steps:
[0111] (1) Preparation of sulfur-doped three-dimensional network structure conductive polymer / graphene / carbon nanotube composite carbon material
[0112] a) adding an appropriate amount of sodium dodecylbenzenesulfonate to the...
Embodiment 3
[0121] This embodiment provides a composite positive electrode material, which includes: a sulfur-doped three-dimensional network structure conductive polymer / graphene / carbon nanotube composite carbon material, and tetrasulfide tetrasulfide loaded on the surface of the composite carbon material Three vanadium nanoparticles; the surface includes at least one of the outer surface of conductive polymer particles, the sheet surface and interlayer of graphene, and the outer surface of carbon nanotubes; the vanadium tetrasulfide and composite carbon material The mass ratio is 2:1, the carbon nanotube length is 600nm, and the tube diameter is 12nm.
[0122] The preparation method of the positive electrode material of the method comprises the following steps:
[0123] (1) Preparation of sulfur-doped three-dimensional network structure conductive polymer / graphene / carbon nanotube composite carbon materials
[0124] a) Add an appropriate amount of cetyltrimethylammonium bromide to the g...
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