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na rre ca ed capacitance and cycling stability plus high power density. nanotubes [23]. Therefore, NiCo2O4 has been conceived as Zhang et al. Nanoscale Research Letters 2014, 9:139 http://www.nanoscalereslett.com/content/9/1/139promising electrode for SCs. The fabrication methodNormal University, Xinyang 464000, People's Republic of China Full list of author information is available at the end of the articleIt has been well established that nanostructured electrode designs can enhance both the power density (or rate capability) and cycling stability. Although a wide variety of nanostructures have been created and tested, it still represents a grand challenge to enhancing the capacity, maintaining the excellent rate capability and a promising electrode material for SCs owing to its high specific capacitance, environmental compatibility, and cost-effectiveness. In this communication, we demonstrate a rapid and facile method to prepare highly ordered 1D nanoneedle-like NiCo2O4 arrays on carbon cloth serving as electrode materials for SCs. Remarkably, the carbon cloth supported NiCo2O4 nanoneedles manifests ultrahigh SCs (660 F g−1 at 2 A g−1) and good cycling stability (91.8 % capacitance retention after 3,000 cycles) at high rates in 2 M KOH aqueous electrolyte, making it