Iranian Research Organization for Science and Technology (IROST) Hydrogen, Fuel Cell & Energy Storage 2980-8537 10 2 2023 06 01 Highly Ordered Nanoporous β-Ni(OH)2 Nanobelt Array Architectures as Electrode Material for Electrochemical Capacitors: Design, Synthesis, Characterization and Supercapacitive Evaluation 157 171 1375 10.22104/hfe.2024.6625.1278 EN Zahra Norouzi Department of Chemical Technologies, Iranian Research Organization for Science and Technology (IROST), Tehran, 33535111, Iran Seyed Heydar Mahmoudi Najafi Department of Chemical Technologies, Iranian Research Organization for Science and Technology (IROST), Tehran, 33535111, Iran 0000-0002-5464-0754 Sayed Ahmad Mozaffari Department of Chemical Technologies, Iranian Research Organization for Science and Technology (IROST), Tehran, 33535111, Iran 0000-0002-6334-0294 Journal Article 2023 03 25 The electrochemical performances derived from the supercapacitors extremely depend on their morphology. So, designing nanostructured electrode materials has a dramatic role in supercapacitors. Herein, highly ordered nanoporous Ni(OH)2 nanobelt arrays (HONNA) were synthesized via a mild wet-chemical route. Ammonia and persulfate concentrations played an important role in the formation of the nanobelt array architecture. The as-prepared nanobelt arrays were characterized using FE-SEM, FT-IR, XRD, and EDX analysis. The resultant Ni(OH)2 nanobelt electrode revealed a specific capacitance of 384 mF cm 2 at 1.0 mA cm 2, fast rate performance, and excellent cycle life. These notable electrochemical features were related to the morphology of highly ordered nanoporous nanobelt 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 highly ordered nanoporous Ni(OH)2 nanobelt arrays were suitable candidates as electrode material in supercapacitors. https://hfe.irost.ir/article_1375_70feb62b69f16e0238f741fab228fec2.pdf