▎ 摘　　要

NOVELTY - Composition comprises an active material, conductive material, binder and synergistic agent, where the synergistic agent comprising silicon containing derivative (I) and silicon alcohol derivative (II). USE - Composition used for forming film layer of positive electrode sheet in secondary battery. ADVANTAGE - The composition improves the flexibility of the pole piece film layer, energy density of the battery by thick coating, and film layer of the peeling strength, to improve the cycle performance of the secondary battery, and solves the problem that the thick film layer pole piece is easy to crack. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: 1. positive electrode sheet, which comprises a current collector and film layer attached to the current collector, where the film layer is formed by the composition for positive electrode the electrode sheet film layer; and 2. method for preparing positive electrode sheet, involving: a. mixing the positive electrode, synergistic agent with portion of solvent to obtain slurry A; b. mixing the active material, conductive material, binder, the slurry A and the rest portion of the solvent to obtain positive electrode sheet film layer; and c. coating the slurry B for positive electrode the pole piece film layer on current collector surface form a film layer, and drying film layer to obtain product.