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Direct Growth of Cobalt Hydroxide Rods on Nickel Foam and Its Application for Energy Storage |
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| Authors: | Dr. Rahul R. Salunkhe Dr. Bishnu Prasad Bastakoti Dr. Chun‐Tsung Hsu Dr. Norihiro Suzuki Prof. Dr. Jung Ho Kim Prof. Dr. Shi Xue Dou Prof. Dr. Chi‐Chang Hu Prof. Dr. Yusuke Yamauchi |
| Affiliation: | 1. World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1‐1 Namiki, Tsukuba, Ibaraki 305‐0044 (Japan), http://www.yamauchi‐labo.com;2. Laboratory of Electrochemistry and Advanced Materials, Department of Chemical Engineering, National Tsing Hua University, Hsin‐chu 30013 (Taiwan);3. International Center for Young Scientists (ICYS), National Institute for Materials Science (NIMS), 1‐2‐1 Sengen, Tsukuba, Ibaraki 305‐0047 (Japan);4. Institute for Superconducting and Electronic Materials, University of Wollongong, Innovation Campus, North Wollongong, NSW 2500 (Australia);5. Faculty of Science and Engineering, Waseda University, 3‐4‐1 Okubo, Shinjuku, Tokyo 169‐8555 (Japan) |
| Abstract: | The present work reports synthesis of cobalt hydroxide (Co(OH)2) rods on nickel foam and its supercapacitor application. Hierarchical Co(OH)2 rods with length of approximately 3.5 μm and diameter of approximately 400 nm were prepared by one‐step, simple, and inexpensive chemical‐bath‐deposition method. The direct growth of Co(OH)2 rods on the Ni foam gave three dimensional (3D) structure for easy access of electrolyte throughout material surface. Also, well‐adhered interface between Co(OH)2 rods and Ni‐foam surface gave better conduction channels. Detailed electrochemical study was performed by using cyclic voltammetry and galvanostatic charge/discharge measurements. The results demonstrate that Co(OH)2 rods on Ni foam are efficient electrodes for supercapacitor application. |
| Keywords: | chemical‐bath‐deposition method cobalt nanostructures rods supercapacitors |