electrodeposited ni(oh)2 nanostructures on electro-etched carbon fiber paper for highly stable supercapacitors

Herein, we introduce a facile, inexpensive and fast, and additive-/template-free method to fabricate highly stable nickel hydroxide nanofibers for supercapacitor applications. ni(oh)2 nanofibers were electrodeposited on electro-etched carbon fiber paper by a potential step method (ni(oh)2-ecfs) and characterized using scanning electron microscopy and x-ray diffraction analysis. electrochemical performance of ni(oh)2-ecf was studied in symmetric two-electrode assembly by cyclic voltammetry, galvanostatic charge–discharge method, and electrochemical impedance spectroscopy. a specific capacitance of 277.5 f g−1 was achieved for the symmetric supercapacitor based on two identical ni(oh)2-ecfs. our findings demonstrate high-rate capability with excellent stability (approximately 100 % capacitance retention) for ni(oh)2-ecf supercapacitor, originated from the intimate contact between ni(oh)2 and ecf. our studies suggest the ni(oh)2-ecf electrode as an excellent material for supercapacitor applications.