Abstract
A mini-hollow polyhedron Mn(2)O(3)is used as the anode material for lithium-ion batteries. Benefiting from the small interior cavity and intrinsic nanosize effect, a stable reconstructed hierarchical nanostructure is formed. It has excellent energy storage properties, exhibiting a capacity of 760 mAh g(-1) at 2 A g(-1) after 1000 cycles. This finding offers a new perspective for the design of electrodes with large energy storage.