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Sponge-like β-Ni(OH)2 nanoparticles: synthesis, characterization and electrochemical properties

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Abstract

The present investigation describes the synthesis of uniform sponge-like Ni(OH)2 nanoparticles on stainless steel substrates by a two-step successive ionic layer adsorption and reaction method; the study also explores electrochemical properties. The formation of the β-phase Ni(OH)2 and it’s nanocrystallinity are confirmed by X-ray diffraction and X-ray photoelectron spectroscopy studies. Scanning electron microscopy revealed the formation and random distributions of porous and sponge-like nanoparticles with high Brunauer–Emmett–Teller surface area of 56.4 m2 g−1. The maximum specific capacitance of 428 F g−1 was obtained at 5 mV s−1 in a 2 M KOH electrolyte, indicating promising supercapacitor applications with remarkable rate capability. These results suggest the importance of rational design and synthesis of thin nanomaterials for high-performance energy applications.

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Acknowledgements

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (No. R15-2008-006-03002-0). One of the authors Dr. D. P. Dubal acknowledges to the support from the BK-21 Program.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Gwangju Institute of Science and Technology, 261 Cheomdan-gwagiro, Buk-gu, Gwangju, 500-712, Republic of Korea

    D. P. Dubal, S. H. Lee & W. B. Kim

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  1. D. P. Dubal
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  2. S. H. Lee
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  3. W. B. Kim
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Correspondence to D. P. Dubal.

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Dubal, D.P., Lee, S.H. & Kim, W.B. Sponge-like β-Ni(OH)2 nanoparticles: synthesis, characterization and electrochemical properties. J Mater Sci 47, 3817–3821 (2012). https://doi.org/10.1007/s10853-011-6236-7

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  • DOI: https://doi.org/10.1007/s10853-011-6236-7

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