▎ 摘　　要

NOVELTY - The utility model claims a cathode structure of lithium battery, comprising a current collector, a graphene layer, a nano carbon silicon particle layer, a silicon powder layer, a microporous ceramic heat insulation coating, an oxide particle layer and a polyolefin porous layer. The current collector comprises a first copper layer, a second copper layer and a nickel layer. The utility model is provided with a silicon powder layer, so that the lithium battery cathode is repeatedly embedded in the process, the cathode active material generated in the charging and discharging process of expansion to limit and buffer, reducing the cathode active material powder falling, prolonging the service life of the battery. micro-pore ceramic heat insulation coating is set, so that the temperature generated by the lithium battery in the using process is mostly absorbed by the micro-pore ceramic heat insulation coating. the cost is low, it is convenient to produce, the practicability is strong, it can be widely applied to the cathode of multiple batteries. The invention solves the problem that the output voltage of the lithium battery is reduced when the lithium battery increases with the temperature in the using process of the lithium battery in the prior art.