以花生壳为原料,采用固相熔融扩散碳化法调控花生壳基衍生硬碳的孔结构制得改性的花生壳衍生硬碳负极材料;通过扫描电镜(SEM)、X射线衍射(XRD)、全自动比表面及孔隙度分析仪对其进行表征分析,并对组装的钠离子半电池进行恒电流电化学充放电测试、循环伏安测试(CV)以及电化学阻抗测试。结果表明,在30 mA/g的电流密度下,材料的可逆容量达到350 mAh/g,在300 mA/g的电流密度下仍能稳定保持335 mAh/g的可逆容量,并且能在高倍率充放电下具有优异的倍率性能。

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.

左宇程(1999-),男,硕士生,研究方向为钠离子电池硬碳负极材料,1017082205@qq.com;陈召勇(1974-),男,博士,教授,博士生导师,研究方向为先进电池与材料,通讯联系人,chenzhaoyongcioc@126.com。