Highly Ordered Nanoporous β-Ni(OH)2 Nanobelt Array Architectures as Electrode Material for Electrochemical Capacitors: Design, Synthesis, Characterization and Supercapacitive Evaluation

The electrochemical performances derived from the supercapacitors extremely depend on their morphology. indeed, designing nanostructured electrode materials has a dramatic role in supercapacitor technology. herein, highly ordered nanoporous ni(oh)2 nanobelt arrays were synthesized using a mild wet-chemical route. ammonia and persulfate concentrations were found to be important factors controlling the formation of the nanobelt array architecture. the as-prepared nanobelt arrays were characterized using fe-sem, ft-ir, xrd, and edx analysis. the obtained ni(oh)2 nanobelt electrode exhibited a specific capacitance of 384 mf cm2 at 1.0 ma cm2, fast rate performance, and excellent cycle life. these notable electrochemical features were attributed to the morphology of highly ordered nano-array architectures, which provides numerous free channels and offers more electroactive sites and sufficient buffering space to moderate inner mechanical stress and minimize the ion transfer path during the redox reactions. these nanoporous ni(oh)2 nanobelt arrays were suitable candidates as advanced electrode material for supercapacitor applications.