Among all the MCo2O4 TTMOs electrode materials for pseudocapacitors, MgCo2O4 with a superior theoretical capacitance (∼3122 F g−1) is one promising candidate and has shown excellent performance as electrode materials in lithium ion battery [34] and [35]. However, the practical capacitance of MgCo2O4 electrode for pseudocapacitors is only 320 F g−1 at 1 A g−1[15] by powder spheroidal MgCo2O4 up to now, which is much lower than the theoretical capacitance. This low specific capacitance is attributed to the simple structures, poor electric conductivity and small surface area. In order to break this limitation, we have to find a novel method that can further improve the capacity of MgCo2O4. To the best of our knowledge, there is no report on the nanostructured MgCo2O4 directly supported on a conductive current collector and used as binder-free electrode for supercapacitors.