【摘要】 石墨烯是一种新型的碳材料，具有单层碳原子构成的二维平面结构。这种特殊的结构使得石墨烯具有许多独特的物理与化学性能。探索了液相还原法和热还原法制备石墨烯的工艺，对2种不同工艺所制备石墨烯材料进行了物理性能测试。以热还原法制备的石墨烯作为锂离子电池负极材料，在50 mA/g的电流密度下其首次充放电容量分别为893.5 mAh/g和2 114.6 mAh/g,分别是传统石墨负极的325%和619%;但石墨烯的首次充放电效率仅为42.25%,30次循环后，容量保持率仅为28.2%;只有通过改性或复合处理，才能充分发挥石墨烯的高容量优势。更多还原

【Abstract】 Graphene is a new type of carbon material, which has a two-dimensional planar structure composed of single-layer carbon atoms.This special structure makes graphene have many unique physical and chemical properties.The processes of preparing graphene by liquid phase reduction and thermal reduction were explored, and the physical properties of graphene materials prepared by two different processes were tested.The first charge discharge capacities of graphene prepared by thermal reduction method as anode material of lithium ion battery under current density of 50 mA/g are 893.5 mAh/g and 2 114.6 mAh/g respectively, which are 325% and 619% of those of traditional graphite anode respectively.However, the first charge discharge efficiency of graphene is only 42.25%,and after 30 cycles, the capacity retention rate is only 28.2%; Only through modification or composite treatment can graphene give full play to its high capacity advantage.更多还原