▎ 摘　　要

NOVELTY - Composite cathode sheet comprises an active material layer set on at least part of the surface of the current collector, the active material of the active material layer comprises graphite and hard carbon, the pre-lithiated layer is set on at least part of the surface of the active material layer far away from the current collector, and the pre-lithiated layer comprises an inert lithium powder, a first binder, a first conductive agent and a filler. USE - The composite cathode sheet useful in lithium-ion battery (claimed). ADVANTAGE - The composite cathode sheet improves initial efficiency and energy density of the battery, and improves cycle performance of the battery. The lithium-ion battery can be rapidly charged. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: preparation method of composite cathode sheet; and preparation method of lithium-ion battery.