The invention discloses a
silicon-carbon composite
anode comprising a
silicon source and a
carbon source, wherein
silicon source is monatomic silicon, the
particle size distribution is 100 nm to 80 microns, and the
mass of the silicon source accounts for 10-80% of the total
mass of the silicon-carbon composite
anode; the
carbon source comprises a carbon
anode material and a conductive agent, the carbon anode material is one or more of carbon
fiber,
graphite and mesocarbon microbead, and the
mass of the carbon anode material accounts for 10-90% of the total mass of the
carbon source. According to the silicon-carbon composite anode disclosed by the invention, one-step
coating forming,
hot pressing flaking,
carbonization treatment and high-temperature
calcination are carried out on anode
slurry prepared by mixing the silicon source with the carbon source, so as to guarantee that the silicon material is effectively dispersed in a
carbon skeleton, the prepared silicon-carbon anode can effectively relieve the
volume expansion of the silicon material in charging and discharging processes in a circulation process and guarantee excellent cycle performance of the battery; the silicon-carbon composite anode is prepared by one-step
coating forming, and no
current collector is needed, so that the production process is simplified and the battery is guaranteed to have
high energy density; meanwhile, the invention further provides a
lithium ion battery containing the silicon-carbon composite anode.