对甲基苯磺酸钠掺杂聚吡咯/二氧化钛纳米管阵列全电池的电化学储锂性能  

Electrochemical Li-storage Performances of Sodium P-toluenesulfonate Doped Polypyrrole/TiO_2 Nanotube Arrays Full Cell

作　　者：廖启书 代志鹏[1] 侯宏英[1] 刘显茜[2] 姚远[1] 李栋栋[1] 余成义[1] LIAO Qishu;DAI Zhipeng;HOU Hongying;LIUXianxi;YAO Yuan;LI Dongdong;YU Chengyi(Faculty of Material Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China;Faculty of Mechanical and Electronic Engineering,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]昆明理工大学材料科学与工程学院,昆明650093 [2]昆明理工大学机电工程学院,昆明650093

出　　处：《硅酸盐学报》2019年第4期508-513,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金项目(51363011);教育部第46批留学归国科研启动基金项目(6488-20130039);云南省高层次引进人才工作经费项目(10978125);云南省第十九批学术带头人项目;昆明理工大学重点学科建设项目(14078232);昆明理工大学学科方向团队经费项目(14078311)

摘　　要：采用电化学方法制备了对甲基苯磺酸钠掺杂的聚吡咯(TsONa/PPy)锂离子电池正极材料和二氧化钛纳米管阵列(TiO_2NT)负极材料。利用扫描电子显微镜和X射线能量色散光谱仪研究了样品的微观结构及形貌,并进一步组装成全电池,利用恒流充–放电和循环伏安(CV)技术测试了其电化学性能。结果表明:对甲基苯磺酸钠掺杂的聚吡咯正极材料是由直径为3μm左右的微球组成,二氧化钛负极材料则呈现三维有序纳米管阵列形貌,两种电极材料的表面皆凸凹不平;由二者组成的全电池首次放电比容量约为105 mA·h/g,经过50次循环后,可逆放电比容量仍保持在65 mA·h/g,表现了良好的循环稳定性,此外还表现了良好的倍率性能。Sodium p-toluenesulfonate doped polypyrrole(TsONa/PPy)cathode material and titania nanotube(TiO2NT)arrays anode material for lithium ion battery were synthesized by an electrochemical method.The microstructures and morphologies of the as-prepared sample were investigated by scanning electron microscopy and energy dispersive X-ray spectroscopy.The electrochemical performances of TsONa/PPy/TiO2NT full cell were investigated by galvanostatic charge–discharge and cyclic voltammogram.The results show that TsONa/PPy cathode material consists of many microspheres with the diameter of about 3μm,and TiO2 anode material appears three-dimensional ordered nanotube arrays with the tough and uneven surfaces.TsONa/PPy/TiO2NT full cell delivers an initial discharge specific capacity of 105 mA·h/g,and the corresponding reversible discharge specific capacity is 65 mA·h/g even after 50 cycles,indicating a good cycle stability.In addition,the full cell also exhibits a good rate performance.

关 键 词：对甲基苯磺酸钠 聚吡咯 二氧化钛纳米管阵列 全电池 

分 类 号：O646[理学—物理化学]