中间相沥青基介孔炭的表征及其用作锂离子电池负极材料的电化学性能

Characterization of mesophase pitch-based mesoporous carbon and its electrochemical properties as anode materials of lithium ion battery

以中间相沥青为碳源、CaCO_3为模板,制备中间相沥青基介孔炭(MPMC)。采用XRD、SEM、TEM等手段表征所制介孔炭的结构和形貌,并将其用作锂离子电池的负极材料,测试电化学性能。结果表明,所制MPMC具有丰富的介孔结构和较大的比表面积及孔体积,随着CaCO_3质量分数的增加,MPMC的比表面积和孔体积先增加后减小,当CaCO_3的质量分数为70%时,所制MPMC的比表面积和孔体积最大;MPMC用作锂离子电池负极材料具有良好的电化学性能,能有效提高锂离子电池的可逆比容量,具有良好的循环稳定性和倍率性能。

With mesophase pitch as carbon source,CaCO_3 as a template,mesophase pitch-based mesoporous carbon（MPMC）was prepared.The structure and morphology of the mesoporous carbon were characterized by means of XRD,SEM,TEM et al.The prepared mesoporous carbon was used as anode materials of lithium ion battery to test their electrochemical properties.The results show that the prepared MPMC has rich mesoporous structure,large specific surface area and pore volume.With the increase of CaCO_3 mass percentage,the specific surface area and pore volume of MPMC firstly increase and then decrease,and when the mass percentage of CaCO_3 is 70%,the specific surface area and pore volume of the prepared MPMC reach the maximum.The MPMC used as anode materials of lithium ion battery exhibits good electrochemical properties,which can effectively improve the reversible specific capacity of lithium ion battery and has good cycle stability and rate performance.