Facile Synthesis of Ni(OH)_2 Nanoflakes on Carbon Nanotube Films as Flexible Binder-Free Electrode for Supercapacitors

摘要

Freestanding Ni(OH)_2 nanoflakes on CNT films (NNCF) electrode with high specific capacitance is effectively fabricated via a facile chemical precipitation method. The CNT films function as conductive networks and the nucleation centers of Ni(OH)_2 nanoflakes. The resulted ultrathin α-Ni(OH)2 exhibits a high specific capacitance of 3351 F g~(-1) at a scan rate of 2 mV s~(-1) and a good cycling stability with a visibly low capacitance loss of 15% at a high scan rate of 70 mV s~(-1), suggesting promising potential for supercapacitor applications.