MoS_2@GO三维絮状结构的制备及电化学储锂性能  

Synthesis and Electrochemical Lithium Storage Properties of MoS_2@GO Three-dimensional Flocculent Structure

作　　者：徐飞强[1] 甘永平[1] 罗剑敏 张文魁[1] 

机构地区：[1]浙江工业大学材料科学与工程学院,杭州310014

出　　处：《材料导报》2016年第20期12-16,25,共6页Materials Reports

基　　金：国家自然科学基金(51572240);浙江省自然科学基金(LY16E070004);浙江省公益技术应用研究项目(2016C33009)

摘　　要：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MoS_2@GO复合材料,探讨了MoS_2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0.1A/g电流密度下,50次循环后放电比容量仍有879mAh/g,容量基本没有衰减。在2A/g的高电流密度下还能保持530mAh/g,当电流密度从2A/g恢复到0.1A/g,循环容量能恢复到0.1A/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 879mAh/g at a current density of 0.1A/g after 50 cycles with almost no degradation while served as an anode of Li-ion battery,and moreover,a reversible capacity of^530mAh/g even at 2A/g.When the current density returned from 2A/g to 0.1A/g,the capacity could recover to the original value,endowing the composite with superior rate performance.

关 键 词：MOS2 石墨烯 负极材料 电化学 锂离子电池 储锂 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ152[化学工程—电化学工业]