Preparation of hexagonal nanoporous nickel hydroxide film and its application for electrochemical capacitor |
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| Affiliation: | 1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, PR China;2. Beijing Institute of Radiation Medicine, Beijing, 100850, PR China;3. Tohoku University, 6-6-02 Aramaki-Aza-Aoba, Aoba-ku, Sendai, 980-8579, Japan;1. Centro de Química Estrutural-CQE, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001, Lisboa, Portugal;2. Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, 1049, Portugal;3. Faculty of Physics, Sofia University, 1164, Sofia, Bulgaria;4. Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516, Portugal;5. Universidade Nova de Lisboa, 2829-516, Portugal;6. Charge2C-NewCap, Taguspark, Edificio Inovação II, Caixa Correio 411, 2740-122, Porto Salvo, Oeiras, Portugal;1. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan;2. Department of Research Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Miyamae cho-7, Kofu 400-8511, Japan;1. Center for Energy Storage and Conversion, School of Electrical and Electronics Engineering, SASTRA Deemed University, Thanjavur, 613401, Tamilnadu, India;2. Department of Biological and Environmental Science, College of Life Science and Biotechnology, Dongguk University, 32 Dongguk-ro, Biomedical Campus, Ilsandong-gu, Siksa-dong, 10326, Goyang-si, Gyeonggi-do, South Korea |
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| Abstract: | Nanoporous nickel hydroxide film has been successfully electrodeposited on titanium substrate from nickel nitrate dissolved in the aqueous domains of the hexagonal lyotropic liquid crystalline phase of Brij 56. Low-angle X-ray diffraction (XRD), transmission electron microscopy (TEM), and atomic force microscopy (AFM) studies show that the film has a regular nanostructure consisting of a hexagonal array of cylindrical pores with a repeat center-to-center spacing of about 7 nm. Preliminary electrochemical studies are carried out using cyclic voltammetry (CV) and chronopotentiometry technology. A maximum specific capacitance of 578 F g−1 could be achieved for the nanoporous Ni(OH)2 film electrode, suggesting its potential application in electrochemical capacitors. |
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