石墨烯/Cu-MOF锂电池负极材料的制备及电化学性能研究

Synthesis and Performance of Cu-MOF/rGO as Anode Materials for Lithium Ion Batteries

摘要: 金属有机骨架化合物是一种由金属离子与有机配体通过配位键或共价键合成的新型的电极材料。然而,其低的电子导电率和严重的不可逆锂存储制约了该材料在锂电池领域的实际应用。石墨烯具有一系列独特属性,如高的导电率、高表面积、化学稳定性，机械强度和柔韧性,多孔结构。通常用来掺杂在电极材料中以提高循环性能和增加电池的容量。在本实验中,我们研究了Cu-MOF掺杂石墨烯(Cu-MOF/RGO)作为锂电负极材料的电化学性能。结果表明,在充放电电流密度为50 mA g-1时，充放电循环50次后，材料的放电比容量可达到520 mAh g-1。同时该材料也显示出较好的倍率性能和较高的库仑效率。由此可以看出Cu-MOF/RGO是一种具有前景的锂离子电池负极材料。

Abstract: Probing the electrochemical response of rGO-doped Cu-MOF composite used as an anode in a lithium ion batteries (LIBs) is focused in this work. In consequence, the resulting material as an anode for LIBs delivers a reversible capacity of 520 mAh/g after 50 cycles at a current density of 50 mA/g with an excellent coulombic efficiency and rate performance. The result indicates that Cu-MOF/rGO composite is a promising anode material for lithium battery applications.