调控炭化过程优化煤基硬炭负极储钠性能

郭行,韩纹莉,董晓玲,李文翠

Adjusting carbonization process to optimize sodium storage performance of coal-based hard carbon anode

Hang GUO,Wenli HAN,Xiaoling DONG,Wencui LI

图6 XJM-2-1-60和XJM-2-3-60样品在1 A·g-1电流密度下的循环性能图(a)。XJM-2-1-60样品：在0.1 mV·s-1扫速下的循环伏安曲线图(b)；交流阻抗图(c)；在0.1~1.0 mV·s-1不同扫速下的循环伏安曲线图(d)；扫速与氧化峰峰值的线性关系(e)；扫速与还原峰峰值的线性关系(f)

Fig.6 Cycle performance of XJM-2-1-60 and XJM-2-3-60 samples at a current density of 1 A·g-1 (a). XJM-2-1-60: CV curves at a scan rate of 1.0 mV·s-1 (b); electrochemical impedance spectroscopy (c); CV curves at scan rates of 0.1—1.0 mV·s-1 (d); linear relationship between ln i (logarithm current) and ln v (logarithm scan rate) of oxidation peaks (e); linear relationship between ln i (logarithm current) and ln v (logarithm scan rate) of reduction peaks (f)