Polymer, polymer electrolyte and lithium ion battery

The invention relates to a polymer, a polymer electrolyte and a lithium ion battery, the polymer comprises a polymer main chain and a side chain, and the side chain contains a conjugated ring group and an epoxy polycyclic group; the conjugated ring group is selected from substituted or unsubstituted C10-C20 conjugated aromatic groups; the epoxy polycyclic group is selected from a substituted or unsubstituted C3-C8 epoxy polycyclic group; the polymer backbone is selected from polyalkoxy ethers. According to the polymer, the polymer electrolyte and the lithium ion battery provided by the invention, the interaction between the polymer electrolyte and an active substance in an electrode plate can be improved, the cohesiveness of the polymer electrolyte is improved, the separation of the electrode plate from an electrolyte interface is avoided, and the stability of a battery interface is improved. 本申请涉及聚合物、聚合物电解质及锂离子电池，聚合物包括聚合物主链和侧链，侧链含有共轭环基团和环氧多元环基团；共轭环基团选自取代或未取代的C10～C20共轭芳香基团；环氧多元环基团选自取代或未取代的C3～C8环氧多元环基团；聚合物主链选自