Using peanut shell as raw material,the modified peanut shell based hard carbon anode material is prepared through using solid phase melting diffusion carbonization method to regulate the pore structure of peanut shell based hard carbon.It is characterized by means of scanning electron microscopy(SEM),X-ray diffraction(XRD)and automatic specific surface and porosity analyzer.Constant current electrochemical charge-discharge test,cyclic voltammetry test(CV)and electrochemical impedance test are carried out on the assembled sodium ion half battery.Results show that the reversible capacity of the material can reach 350 mAh·g-1 at a current density of 30 mA·g-1,and maintain at 335 mAh·g-1 stably at a current density of 300 mA·g-1.The material can have excellent magnification-rate performance at higher rate charge and discharge.
关键词
硬碳/钠离子电池/负极材料/电化学性能/孔结构
Key words
hard carbon/sodium ion battery/negative electrode material/electrochemical performance/pore structure
维普
万方数据