以氧化镁为模板,将葡萄糖酸镁和柚子皮粉混合低温预烧生成碳复合材料的前驱体,并进一步通过高温碳化制备多孔结构硬碳材料。通过XRD、SEM、FT-IR、XPS和BET对复合材料进行表征分析,表明氧化镁作为模板制备了具有明显多孔结构的柚子皮基硬碳。对组装的钠离子电池进行循环伏安(CV)、电化学阻抗(EIS)及电化学充放电测试,结果表明,在30 mA/g的电流密度下,电池放电容量达到400 mAh/g。

Using magnesium oxide as a template,magnesium gluconate and shaddock peel powder are mixed and pre-calcined at low temperature to form the precursor of carbon composite materials,which is further carbonized at high temperature to obtain porous structured hard carbon materials.The composite is characterized through XRD,SEM,FT-IR,XPS and BET analysis,and it is proved that shaddock peel-based hard carbon with obvious porous structure is prepared with magnesium oxide as the template.Through cyclic voltammetry (CV),electrochemical impedance spectroscopy (EIS),and electrochemical charging and discharging tests,it is found that the discharge capacity of the battery can reach 400 mAh·g^-1 under a current density of 30 mA·g^-1.

张京涛(1997-),男,硕士生,研究方向为钠离子电池硬碳负极材料,1803037253@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。