摘要：为了大量、方便地制备电化学性能优异的锂离子电池负极材料,利用一步煅烧法制备石墨烯包覆Mn3O4纳米复合粉体,采用X射线衍射、扫描电子显微镜、透射电子显微镜对复合粉体进行表征,并进行电化学性能检测。结果表明:石墨烯把Mn3O4颗粒很好地包覆在里面;石墨烯包覆Mn3O4纳米复合粉体具有优秀的电化学性能,含碳质量分数为13%的石墨烯包覆Mn3O4纳米复合粉体首次放电比容量达到859.7 m A·h/g,电流密度为1 600 m A/g时的放电比容量保持在380 m A·h/g,循环100次后放电比容量几乎保持不变。
关键词：煅烧法；石墨烯；纳米复合粉体
Abstract：To obtain the anode materials with good electrochemical performance for lithium ion batteries liberally and conveniently,the graphene coated Mn3O4 nano-composites was prepared by the method of one step calcination. The composites were characterized by XRD,SEM and TEM,and the electrochemical detection was conducted. The results show that the Mn3O4 particles are well anchored in the graphene. The graphene coated Mn3O4 nano-composites has a good electrochemical performance. The initial discharge capacity of graphene coated Mn3O4 nano-composites with carbon mass fraction of 13% reaches 859.7 m A·h/g.The discharge cap acity maintains at 380 m A·h/g even with a high current density of 1 600 m A/g. The materials also display no capacity loss after 100 cycles.
Keywords: calcination method；graphene；nano-composites
