▎ 摘　　要

NOVELTY - Pole piece (100) comprises at least one layered and arranged base material layer (110) and two functional layers (120), where the base material layer is located between the two functional layers. The functional layer comprises multiple lithium cobaltate particles (121) and multiple conductive particles (122) dispersed around the lithium cobaltate particles. The aluminum content in the lithium cobaltate particles is greater than or equal to 4500 PPM. USE - The pole piece is useful in battery of electronic device (all claimed). ADVANTAGE - The pole piece: improves the power discharge cycle performance under high voltage of the battery. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the pole piece in a battery. Pole piece (100) Base material layer (110) Function layer (120) Lithium cobaltate particles (121) Conductive particles (122) Adhesive agent (123)