▎ 摘　　要

NOVELTY - Sodium-ion battery comprises anode piece. USE - Used as sodium-ion battery. ADVANTAGE - The sodium-ion battery: have excellent energy density, kinetic performance, cycle performance, and particle size, specific surface area and single-sided coating amount of active material in anode piece, which are synergistic; and improves comprehensive performance of sodium-ion batteries to ensure that when discharge rate above 3C is satisfied. DETAILED DESCRIPTION - Sodium-ion battery comprises anode piece. The particle size, specific surface area (Brunauer, Emmett and Teller (BET)) and single-sided coating amount (SD) of active material in anode piece satisfies 1less than or equal to(D90-D10)/D50less than or equal to1.5, and 0.8less than or equal to(SDxD50)/BETless than or equal to1.9.