▎ 摘　　要

NOVELTY - The piece has reduced graphene oxide sheets and modified nano-anode materials. The modified nano-anode material is provided with an inner core. A cladding layer covering the surface of the inner core. The molecular formula of the inner core is AxBy. A is at least one selected from antimony, molybdenum, and silicon. B is at least one selected from sulfur, selenium, and oxygen, 1≤x≤3, 1≤y≤4, and the cladding layer is provided with polydopamine. USE - Cathode pole piece for secondary battery including electric vehicle, hybrid vehicle, plug-in hybrid electric vehicle (PHEV), and hydrogen-powered vehicle. ADVANTAGE - The piece has high tensile modulus and tensile strength, which can improve the energy density of the secondary battery, and prolongs the cycle life. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: a Method for preparing cathode sheet; a secondary battery; a battery module; a battery pack; and a electric device. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the cathode pole piece for secondary battery. 5Secondary battery