Interconnected porous MnO nanoflakes for high-performance lithium ion battery anodes

• Published in: Journal of materials chemistry Vol. 22; no. 18; pp. 9189 - 9194
• Main Authors: Li, Xiuwan, Li, Dan, Qiao, Li, Wang, Xinghui, Sun, Xiaolei, Wang, Peng, He, Deyan
• Format: Journal Article
• Language: English
• Published: 01.01.2012
• Subjects: Current density; Cycles; Electrodes; Foams; Lithium-ion batteries; Nanocomposites; Nanomaterials; Nanostructure
• ISSN: 0959-9428; 1364-5501
• DOI: 10.1039/c2jm30604b

Interconnected porous MnO nanoflakes on nickel foam were prepared by a reduction of hydrothermal synthesized MnO 2 precursor in hydrogen. The architectures were applied to lithium ion batteries as electrodes. Compared with the as-synthesized MnO 2 anode, porous MnO nanoflakes showed superior cycling stability and rate performance. A high reversible capacity of 568.7 mA h g 1 was obtained at a current density of 246 mA g 1 for the second discharge. It retained a capacity of 708.4 mA h g 1 at the 200th chargedischarge cycle after cycling with various current densities up to 2460 mA g 1 and delivered a capacity of 376.4 mA h g 1 at a current density as high as 2460 mA g 1 , indicating that the architecture of the porous MnO nanoflakes grown on Ni foam is a promising electrode for lithium ion batteries. Interconnected porous MnO nanoflakes grown on Ni foam exhibit excellent cycling stability and superior rate capability.