Novel double-shelled CoMn ₂O ₄ hollow microcubes with nanometer-sized building blocks have been prepared by a facile co-precipitation and annealing method. In virtue of the unique structural features, the resultant CoMn ₂O ₄ hollow structures exhibit high specific capacity (μ830 mA h g ^-1 at 200 mA g ^-1) and good cycling performance as an anode material for lithium-ion batteries.