A Cu-NWs paper synthesized by a one-step method is first presented. Owing to its good conductivity, it is an effective framework to interlink TMOs and prevent aggregation. For a practical application, the core–shell Cu NWs@ultrathin CoO_x delivers good performance for the catalytic oxidation of glucose and energy storage, with a sensitivity of 396.57 μA mM⁻¹ cm⁻² and a capacitance of 797.7 F g⁻¹ (1 A g⁻¹).