The invention provides a nanometer
silicon conductive polymer composite material, belonging to the technical field of
lithium ion batteries. According to the nanometer
silicon conductive polymer composite material, a
silicon-based
composite material is prepared by in-situ
polymerization according to a chemical oxidation method in which silicon nanoparticles is used as an active substance,
pyrrole and phenylamine are used as monomers, water is as a reaction
solvent, p-methylbenzene
sulfonic acid and absolute ethyl
alcohol are used as dispersing agents,
ammonium persulfate is used as oxidant and diluted
hydrochloric acid is used as a protonic acid
doping agent, the silicon-based composite material is of a core-shell structure in which silicon nanoparticles are uniformly coated with conductive
polypyrrole-phenylamine, the core silicon nanoparticles have the
lithium storage activity, and due to conductive
polypyrrole-phenylamine of the shell, the
conductivity of the silicon-based material is remarkably improved. Therefore, as a
cathode material of the
lithium ion battery, the composite material is relatively good in charge /
discharge circulation property. In addition, the composite material provided by the invention is simple in preparation process, is prepared from easily available raw materials, is safe and environment-friendly and has a great commercial prospect in production of lithium
ion batteries.