▎ 摘　　要

NOVELTY - Sodium-ion battery negative electrode nickel hydrogen carbonate/graphene composite material comprises 60-95%, preferably 80-95%, nickel bicarbonate and graphene. USE - Sodium-ion battery negative electrode nickel hydrogen carbonate/graphene composite material used for battery (claimed). ADVANTAGE - The material has uniform size, good electrochemical performance, excellent magnification performance and cycle stability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the preparation of sodium-ion battery negative electrode nickel hydrogen carbonate/graphene composite material comprising dispersing graphene oxide in deionized water, adding divalent nickel salt, reducing agent and water-soluble carbonate or urea, mixing, reacting at 70-200 degrees C for 1-48 hours, washing and drying.