▎ 摘　　要

NOVELTY - Lithium-ion battery cathode pole piece comprises cathode active material, negative thermal expansion material and thermal conductivity additive. USE - The lithium-ion battery cathode pole piece is useful in lithium-ion battery. ADVANTAGE - The lithium-ion battery cathode pole piece solves problem of the expansion of the silicon-carbon system pole piece alleviated by using the property that the volume shrinkage of the material during the charging process is exactly opposite to the expansion of the volume of silicon and graphite due to the fast charging heat generation, maximizes heat transfer to the negative thermal expansion material, improves battery cycle performance, improves utilization rate of the internal space of the battery, increases volumetric energy density and mass energy density.