Pseudocapacitive metal oxide active materials are promising for use in high performance supercapacitors. However, their poor electrical conductivity greatly hinders their practical application. We formed NiO and Co₃O₄ active materials on the surface of a highly conductive NiCo nanowire membrane current collector by a simple air oxidation method to fabricate a self-supported flexible NiO/Co₃O₄@NiCo electrode. This significantly improves electron transport at the interface between the current collector and the active NiO/Co₃O₄. Furthermore, the reticular nanowire network facilitates ion transportation and releases strain caused during charge and discharge. Due to this unique structural characteristic, the NiO/Co₃O₄@NiCo electrode delivers a high specific capacitance of 1.36 F cm⁻² at a current density of 5 mA cm⁻², and excellent cycling stability with a capacitance retention of 96.95% after 10 000 cycles. An asymmetric supercapacitor was assembled using the NiO/Co₃O₄@NiCo as the cathode and an activated carbon electrode as the anode, which delivered an energy density of 0.32 mWh cm⁻² at a power density of 8 mW cm⁻². Even at a high power density of 40 mW cm⁻², an energy density of 0.17 mWh cm⁻² was achieved, suggesting its promising use as an efficient electrode for high performance supercapacitors.

伪电容金属氧化物活性材料有望用于高性能超级电容器。然而，它们差的电导率极大地阻碍了它们的实际应用。我们通过简单的空气氧化法在高导电性NiCo纳米线膜集电器的表面上形成了NiO和Co ₃ O ₄活性材料，以制造自支撑的柔性NiO / Co ₃ O ₄ @NiCo电极。这显着改善了集电器和活性NiO / Co ₃ O ₄之间的界面处的电子传输。此外，网状纳米线网络有助于离子传输并释放在充电和放电过程中引起的应变。由于这种独特的结构特性，NiO / Co ₃ O ₄ @NiCo电极在5 mA cm ^-2的电流密度下可提供1.36 F cm ^-2的高比电容，并具有出色的循环稳定性和96.95％的电容保持率一万次循环后。使用NiO / Co ₃ O ₄ @NiCo作为阴极和活性炭电极作为阳极组装了不对称超级电容器，该电容器以8 mW cm ^-2的功率密度提供了0.32 mWh cm ^-2的能量密度。。即使在40 mW cm ^-2的高功率密度下，也能达到0.17 mWh cm ^-2的能量密度，表明其有望用作高性能超级电容器的有效电极。