Preparation and electrochemical performance of MWCNTs@MnO2 nanocomposite for lithium ion batteries

• Published in: Science China. Technological sciences Vol. 57; no. 6; pp. 1077 - 1080
• Main Authors: Liu, YingQi, Li, XiuWan, Wei, ZhiWei, Zhang, LiPing, Wei, XiuCheng, He, DeYan
• Format: Journal Article
• Language: English
• Published: Heidelberg Science China Press 01.06.2014
• Subjects: Engineering; aqueous solution preparation; nanocomposite; lithium ion battery; manganese dioxide; electrochemical performances; multi-walled carbon nanotubes
• ISSN: 1674-7321; 1869-1900
• DOI: 10.1007/s11431-014-5468-6

Tubular nanocomposite with interconnected MnO 2 nanoflakes coated on MWCNTs (MWCNTs@MnO 2 ) was fabricated by an aqueous solution method at 80°C. Scanning electron microscopy, X-ray diffraction and galvanostatic charge-discharge tests were used to characterize the structures and electrochemical performances of the as-prepared nanocomposite. The capacity reaches 1233.6 mA h g −1 at a current density of 100 mA g −1 for the first discharge, and it can still maintain a capacity of 633.1 mA h g −1 after 100 charge-discharge cycles. The results show that MWCNTs with good electrical conductivity as anchors of MnO 2 can provide fast electron transport channels for MnO 2 in the electrochemical reactions, and the as-prepared MWCNTs@MnO 2 nanocomposite is a potential anode material for lithium ion batteries.