Formation of nanoporous nickel oxides for supercapacitors prepared by electrodeposition with hydrogen evolution reaction and electrochemical dealloying

Myung-Gi Jeong; Kai Zhuo; Serhiy Cherevko; Chan-Hwa Chung

Korean Journal of Chemical Engineering, Vol.29, No.12, 1802-1805, December, 2012

DOI10.1007/s11814-012-0097-x Export Citation

Formation of nanoporous nickel oxides for supercapacitors prepared by electrodeposition with hydrogen evolution reaction and electrochemical dealloying

Myung-Gi Jeong, Kai Zhuo, Serhiy Cherevko, and Chan-Hwa Chung^†

School of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Korea

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Highly nanoporous nickel oxide electrodes were obtained by electrodeposition accompanied by hydrogen evolution reaction and the selective electrochemical dealloying of copper from Ni-(Cu) porous foam. The nanoporous nickel oxide electrodes consequently have numerous dendritic morphologies composed of nanopores with 20-30 nm diameters. The specific capacitances were 428 F g^(-1) for as-deposited Ni-(Cu) foam electrode and 1,305 F g^(-1) for nanoporous nickel-oxide electrode after dealloying process, respectively. This indicates increased surface area by dealloying process leads to innovative increase of specific capacitance.

Keywords:Nanoporous NiO Foam Electrode;Dendritic Structure;Hydrogen Evolution Reaction;Electrochemical Dealloying;Supercapacitors

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Cherevko S, Kulyk N, Chung CH, Nanoscale., 4(2), 568 (2012)
Cherevko S, Xing XL, Chung CH, Appl. Surf. Sci., 257(18), 8054 (2011)
Cherevko S, Chung CH, Electrochem. Commun., 13, 16 (2011)
Chereyko S, Kulyk N, Chung CH, Langmuir, 28(6), 3306 (2012)
Xia XH, Tu JP, Zhang YQ, Mai YJ, Wang XL, Gu CD, Zhao XB, J. Phys. Chem. C., 115(45), 22662 (2011)
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[2] Zhang Y, Feng H, Wu X, Wang L, Zhang A, Xia T, Dong H, Li X, Zhang L, Int. J. Hydrog. Energy., 34, 4889 (2009)

[3] Hyun TS, Tuller HL, Youn DY, Kim HG, Kim ID, J.Mater. Chem., 20, 8971 (2010)

[4] Zhang Y, Wang L, Zhang A, Song Y, Li X, Wu X, Du P, Yan L, Korean J. Chem. Eng., 28(2), 608 (2011)

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[9] Guan C, Liu J, Cheng C, Li H, Li X, Zhou W, Zhang H, Fan HJ, Energy Environ. Sci., 4, 4496 (2011)

[10] Kim YI, Yoon JK, Kown JS, Ko JM, Korean Chem. Eng. Res., 48(4), 440 (2010)

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[17] Cherevko S,, Xing X, Chung CH, Electrochem. Commun., 12, 467 (2010)

[18] Cherevko S, Chung CH, Electrochim. Acta, 55(22), 6383 (2010)

[19] Xing X, Cherevko S, Chung CH, Mater. Chem. Phys., 126(1-2), 36 (2011)

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[22] Cherevko S, Xing XL, Chung CH, Appl. Surf. Sci., 257(18), 8054 (2011)

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[25] Xia XH, Tu JP, Zhang YQ, Mai YJ, Wang XL, Gu CD, Zhao XB, J. Phys. Chem. C., 115(45), 22662 (2011)

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