Carbon nanotubes can be regarded as tubular one-dimensional nanomaterials rolled from graphene, featuring excellent electrical conductivity and mechanical properties. Carbon nanotubes have demonstrated excellent application performance in the field of conductive agents for lithium-ion batteries. Not only can they significantly reduce the addition amount of conductive agents, but the formed tubular conductive network can also effectively improve the liquid absorption performance of the electrode sheets. The high-quality carbon nanotubes developed after years of research feature high purity, good dispersion, high stability and excellent electrical conductivity.