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

Tubular nanocomposite with interconnected MnO2 nanoflakes coated on MWCNTs (MWCNTs@MnO2) was fabricated by an aqueous solution method at 80A degrees 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 MnO2 can provide fast electron transport channels for MnO2 in the electrochemical reactions, and the as-prepared MWCNTs@MnO2 nanocomposite is a potential anode material for lithium ion batteries.