纳米碳管复合及聚苯胺包覆Sb_(2)MoO_(6)复合材料的制备及储锂性能研究  

Synthesis and lithium storage properties of carbon nanotubes and polyaniline coating of Sb_2MoO_(6) (Sb_2MoO_6/CNT@PANI)

作　　者：张锐 徐芳芳 李佳仪 苏拉 王石泉[2] 刘红英[2] ZHANG Rui;XU Fangfang;LI Jiayi;SU La;WANG Shiquan;LIU Hongying(Hubei Trisun Chemicals Co.Ltd.,Xingfa Group,Yichang 443771,China;College of Chemistry and Chemical Engineering,Hubei University,Wuhan 430062,China)

机构地区：[1]兴发集团湖北泰盛化工有限公司,湖北宜昌443711 [2]湖北大学化学化工学院,湖北武汉430062

出　　处：《湖北大学学报（自然科学版）》2024年第3期376-383,共8页Journal of Hubei University：Natural Science

基　　金：湖北三峡实验室开放/创新基金(SK211005)资助。

摘　　要：以三氟化锑和钼酸铵为锑源和钼源,采用水热法制备出锑钼锑(Sb_(2)MoO_(6))和Sb_(2)MoO_(6)/纳米碳管(CNTs)复合物,利用苯胺聚合在Sb_(2)MoO_(6)和Sb_(2)MoO_(6)/CNTs上继续包覆聚苯胺(PANI)得到Sb_(2)MoO_(6)@PANI (Sb_(2)MoO_(6)/CNT)@PANI。采用XRD、SEM、EDX等手段对样品结构和形貌进行表征,结果发现制备的Sb_(2)MoO_(6)为不均匀的长为10μm的棒状形貌,而CNTs复合后的Sb_(2)MoO_(6)形貌变成厚约为100 nm的片状。作为锂离子电池负极材料,对所有合成的样品进行电化学性能测试,探讨CNTs复合和聚苯胺(PANI)包覆对Sb_(2)MoO_(6)样品的电化学性能的影响。结果表明:Sb_(2)MoO_(6)@PANI、Sb_(2)MoO_(6)/CNTs、(Sb_(2)MoO_(6)/CNTs)@PANI样品的电化学性能均优于Sb_(2)MoO_(6),其中(Sb_(2)MoO_(6)/CNT)@PANI具有最佳的电化学性能。(Sb_(2)MoO_(6)/CNT)@PANI在电压范围为0.01~3 V、电流密度为100 mA·g^(-1)条件下,循环100圈后,放电比容量为650 mAh·g^(-1)。CNTs复合和PANI包覆后的Sb_(2)MoO_(6),颗粒粒径大大降低,还增加了钼酸锑的导电性(阻抗161Ω),在电化学循环过程中有效延缓了Sb_(2)MoO_(6)材料的体积崩塌。Using antimony trifluoride and ammonium molybdate as antimony source and molybdenum source,Sb_(2)MoO_(6) and Sb_(2)MoO_(6)/CNTs were prepared by a hydrothermal method.Sb_(2)MoO_(6)/carbon nanotubes(CNTs)@polyaniline(PANI) composite was prepared by aniline polymerization with the presence of CNTs after hydrothermal treatment.The structure and morphology of the samples were characterized by XRD,SEM,EDX,etc.The as-prepared Sb_(2)MoO_(6)/CNTs composite took on the morphology of irregular sheet-like particles with the thickness of about 100 nm due to the addition of CNTs,whereas the prepared Sb_(2)MoO_(6) took on an uneven rod-like morphology with the length of about 10 μm.As anode materials for lithium ion batteries,the effects of CNTs and PANI coating on the electrochemical performance of the Sb_(2)MoO_(6) were studied,respectively.The Sb_(2)MoO_(6)/CNT@PANI composite shows smaller and uniformly distributed particles with the size of about 500 nm.As anode materials for lithium ion batteries(LIBs),the electrochemical performance of all synthesized samples was comparatively tested.The results show that Sb_(2)MoO_(6)@PANI,Sb_(2)MoO_(6)/CNT,Sb_(2)MoO_(6)/CNT@PANI samples behave better electrochemical performance,compared with pure Sb_(2)MoO_(6).Under a voltage range of 0.01 to 3.0 V and a current density of 100 mA·g^(-1),Sb_(2)MoO_(6)/CNT@PANI electrode exhibits the highest specific discharge capacity(650 mAh·g^(-1) for 100 cycles),compared with pure Sb_(2)MoO_(6),Sb_(2)MoO_(6)@PANI,and Sb_(2)MoO_(6)/CNTs.The combination of CNTs and PANI enables the Sb_(2)MoO_(6) electrode to have better electrochemical properties,which can effectively delay the volume collapse of the material in the cycling process.

关 键 词：负极材料 水热法 Sb_(2)MoO_(6) 电化学性能 锂离子电池 

分 类 号：TM912[电气工程—电力电子与电力传动]