Hierarchical Mn3O4 Microplates Composed of Stacking Porous Nanosheets for High-Performance Lithium Storage

Transition metal oxide based anodes with high capacities and long cycle lifetimes are considered promising candidates to substitute the conventional graphite electrodes with a relatively low capacity. In this work, hierarchical Mn3O4 microplates with a lateral size of approximately 4.9 mu m, composed of stacking porous nanosheets with thicknesses as small as 10nm, were synthesized by using a precursor conversion method. Such a nanosheet stacking arrangement possesses an unusual concave structure with a tight center and loose edge. Owing to the highly open hierarchical structure and good electronic conductivity from the insitu carbon, the as-obtained hierarchical Mn3O4 microplate electrode exhibits remarkable cyclability up to 300 cycles at 500mAg(-1), accompanied with good rate capability (418mAhg(-1) at 2Ag(-1)).