Acta Phys. -Chim. Sin. ›› 2013, Vol. 29 ›› Issue (02): 293-297.

• ELECTROCHEMISTRY AND NEW ENERGY •

Synthesis and Performance of Nano MnO as an Anode Material for Lithium-Ion Batteries

DING Peng1,2,3, XU You-Long1,2, SUN Xiao-Fei1,2

1. 1 Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, Xi'an Jiaotong University, Xi’an 710049, P. R. China;
2 International Center for Dielectric Research, Xi'an Jiaotong University, Xi’an 71004
9. P. R. China;
3 Department of Power, Wuhan Ordnance Non-Commissioned Officer Academy, Wuhan 430075, P. R. China
• Received:2012-09-10 Revised:2012-11-13 Published:2013-01-14

Abstract:

Transition metal oxides, especially manganese monoxide (MnO), are being intensively studied as candidate anode materials for next generation lithium-ion batteries in high efficiency energy storage applications such as portable electronics, electric vehicles, and stationary electricity storage. In this paper, the MnC2O4·2H2O precursor, prepared fromKMnO4 and ascorbic acid, was heat-treated to synthesize nano MnO by a solid-state reaction approach. X-ray diffraction (XRD) showed that the so-obtained MnO had a rock-salt structure with good crystallinity, and scanning electron microscopy (SEM) indicated that the primary particle size was about 50-100 nm, while the secondary particle size was about 400-600 nm. As an active material for lithium-ion batteries, the nano MnO material delivered a reversible capacity of 679.7 mAh·g-1 with an initial columbic efficiency of 68.9% at a current density of 46.3 mA·g-1. The specific discharge capacity slightly decreased from 584.5 to 581.5 mAh·g-1 with a retention of 99.5% after 50 cycles at a current density of 141.1 mA·g-1. Moreover, the material was able to release a capacity of 290 mAh·g-1 at current densities as high as 494.7 mA·g-1 (corresponding to ~2C), which demonstrates reasonable rate performance and moderately fast charge/discharge capabilities. All of the above characteristics make nano MnO promising anode materials for developing high-capacity, long-life, low-cost, and environmentally-friendly lithium-ion batteries.

MSC2000:

• O646