▎ 摘　　要

NOVELTY - Manufacturing sodium ion battery comprises taking hard carbon/MXene composite material as negative electrode active material, and layered oxide as positive electrode active material, then making positive and negative electrode active materials into positive and negative electrode sheets, and assembling to obtain sodium ion battery. USE - The method is useful for manufacturing sodium ion battery (claimed). ADVANTAGE - The sodium-ion battery: has excellent electrical conductivity; improves the electrical conductivity of the hard carbon negative electrode, and functional groups on the surface of MXene can improve the interface performance of the negative electrode. DETAILED DESCRIPTION - Manufacturing sodium ion battery comprises taking hard carbon/MXene composite material as negative electrode active material, and layered oxide as positive electrode active material, then making positive and negative electrode active materials into positive and negative electrode sheets, and assembling to obtain sodium ion battery.