Template synthesis of MnO_2/CNT nanocomposite and its application in rechargeable lithium batteries
模板法制备纳米MnO_2/CNT复合材料及其在锂电池中的应用(英文)作者机构:中南大学化学化工学院长沙410083
出 版 物:《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报(英文版))
年 卷 期:2011年第21卷第9期
页 面:2010-2014页
核心收录:
学科分类:0808[工学-电气工程] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0806[工学-冶金工程] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程(可授工学、理学学位)] 0813[工学-建筑学] 0703[理学-化学] 0814[工学-土木工程] 0702[理学-物理学]
基 金:Projects(21071153 20976198)supported by the National Natural Science Foundation of China
主 题:MnO2/CNT soft template nanocomposite rechargeable lithium batteries
摘 要:Nanostructured MnO2/CNT composite was synthesized by a soft template approach in the presence of Pluronic P123 surfactant. The product was characterized by X-ray diffraction, thermogravimetric and differential thermal analyses, Fourier transformed infrared spectroscopy and high-resolution transmission electron microscopy. The results show that the sample consists of poor crystalline α-MnO2 nanorods with a diameter of about 10 nm and a length of 30-50 nm, which absorb on the carbon nanotubes. The electrochemical properties of the product as cathode material for Li-MnO2 cell are evaluated by galvanostatic charge-discharge and electrochemical impedance spectroscopy (EIS). Compared with pure MnO2 electrode, the MnO2/CNT composite delivers a much larger initial capacity of 275.3 mA-h/g and better rate and cycling performance.