以改良 Hummers法制备了氧化石墨烯(GO),通过水热以及热处理制备了 MoS2@GO 复合材料,探讨了 MoS2与 GO物质的量比对复合材料结构、电化学性能的影响。结果表明,当 MoS2与 GO 的物质的量比为1∶1时,所得复合材料呈现三维絮状结构并具有良好的电化学性能。其作为锂离子电池负极材料,在0.1 A/g 电流密度下,50次循环后放电比容量仍有879 mAh/g,容量基本没有衰减。在2 A/g 的高电流密度下还能保持530 mAh/g,当电流密度从2 A/g恢复到0.1 A/g,循环容量能恢复到0.1 A/g时的水平,表现出优异的倍率性能。
In this work,graphene oxide (GO)was synthesized via modified Hummers method,and afterwards, MoS2 and GO were integrated via a hydrothermal process followed by heat treatment.The effect of molar ratio of MoS2 to GO on the resultant composite′s structure and electrochemical performance was studied.We revealed that when MoS2/GO molar ratio was 1∶1 ,the as-synthesized composite exhibited three-dimensional flocculent structure and excellent electrochemical performance,as it retained a discharge specific capacity of 879 mAh/g at a current densi-ty of 0.1 A/g after 50 cycles with almost no degradation while served as an anode of Li-ion battery,and moreover,a reversible capacity of~530 mAh/g even at 2 A/g.When the current density returned from 2 A/g to 0.1 A/g,the ca-pacity could recover to the original value,endowing the composite with superior rate performance.
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