▎ 摘 要
NOVELTY - Anode material comprises Prussian blue material and carbon layer covering the Prussian blue material. USE - The anode material is useful for anode piece used in sodium ion battery (all claimed). ADVANTAGE - The anode material: has improved surface conductivity, and improved particle surface smoothness, and improves the cycle stability of the sodium-ion battery. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: Preparing anode material. Anode piece. Sodium ion battery.