One-dimension MnCo 2 O 4 nanowire arrays are synthesized on nickel foam by a facile hydrothermal method. The MnCo 2 O 4 nanowires are highly crystalline with an average diameter of 70nm and exhibit excellent properties for electrochemical energy storage. Impressively, the MnCo 2 O 4 nanowire array exhibits noticeable pseudocapacitive performance with a high capacitance of 349.8 F g −1 at 1 A g −1 and 328.9 F g −1 at 20 A g −1 as well as excellent cycling stability. As an anode material for Li-ion batteries, the MnCo 2 O 4 nanowire array delivers an initial specific discharge capacity of 1288.6 mAh g −1 at 100mAg −1 , with reversible capacity retention of 92.7% after 50 cycles. The outstanding electrochemical performances are mainly attributed to its nanowire array architecture which provides large reaction surface area, fast ion and electron transfer and good structure stability.