Optimal Co(OH)2 Nanowire Contents in Graphene Nanosheet Electrode on Its Electrochemical Performance of Supercapacitor
Graphene/Co(OH)2 nanowire composite films were successfully synthesized using a simple three-step treatment, and the effect of the Co(OH)2 nanowire content on the electrochemical properties of the composite films was studied in this study. One-dimensional Co(OH)2
nanowires were homogeneously embedded and dispersed between the prepared graphene papers, forming a layered graphene/Co(OH)2 nanowire hybrid structure. These composite films exhibited better electrochemical properties than the previously reported graphene composites with carbon
spheres such as graphene/CNT composites. These graphene composites were fabricated using the same method we used in this study but without the addition of Co(OH)2 nanowires. The addition of a small amount of Co(OH)2 to reduced graphene oxide (rGO) (RGO:Co(OH)2=5:1)
yielded thick paper-like rGO/Co(OH)2 sandwiches, which showed an excellent specific capacitance of 1032.57 Fg−1 at a scan rate of 5 mVs−1. These results indicate the potential of these composites for the development of highly capacitive energy storage
devices for practical applications.
Keywords: Graphene; Layer-by-Layer Structure; Optimal Co(OH)2 Nanowire; Supercapacitor
Document Type: Research Article
Affiliations: 1: School of Chemical Engineering and Materials Science, Chung-Ang University, Seoul 156-756, Republic of Korea 2: Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong, SAR
Publication date: 01 March 2019
- Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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