High-compaction sodium ion battery negative electrode material, negative electrode plate and sodium ion battery

The invention discloses a high-compaction sodium-ion battery negative electrode material, a negative electrode plate and a sodium-ion battery, the negative electrode material is mixed particles of local-phase particles and mixed-phase particles, the negative electrode material is characterized in that the local-phase particles are hard carbon, the mixed-phase particles are soft carbon, the local-phase particles and the mixed-phase particles are uniformly mixed by adopting coating sintering or physical dispersion, and the negative electrode plate is prepared. Wherein the mass of the mixed phase particles accounts for 0.5-30% of the mass of the mixed particles. The high-compaction sodium-ion battery negative electrode material, the negative electrode plate and the sodium-ion battery have the characteristics of high compaction density, high first charge-discharge efficiency, excellent rate capability and excellent cycle performance. 本发明公开了一种高压实钠离子电池负极材料及负极片和钠离子电池，该负极材料为本相颗粒与混合相颗粒的混合颗粒，其特征在于：本相颗粒为硬碳，混合相颗粒为软碳，本相颗粒