Preparation method of dried-persimmon-like core-shell C/ZnO lithium ion negative electrode sheet and button type lithium ion battery thereof

The invention relates to the technical field of lithium ion negative electrode materials and discloses a preparation method of a dried-persimmon-like core-shell C/ZnO lithium ion negative electrode sheet and a button type lithium ion battery thereof. According to the preparation method, anhydrous ethanol, zinc acetate dihydrate, ethanolamine and glucose are used as raw materials, and the time andtemperature of the hydrothermal reaction are strictly controlled, so that a dried-persimmon-like core-shell C/ZnO material is prepared, and the dried-persimmon-like core-shell C/ZnO greatly improves the conductivity and stability of the existing ZnO negative electrode materials, thereby significantly improving the electrochemical performance. On the one hand, the stress change caused by the volumechange during charging and discharging can be reduced. On the other hand, the dried-persimmon-like morphology increases the specific surface area and effectively improves the cycle performance of thelithium ion battery. In ad