Articles & Issues

Language: English

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received May 20, 2010
Accepted July 30, 2010

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

All issues

Impact of electrolyte additives (alkali metal salts) on the capacitive behavior of NiO-based capacitors

Yong Zhang^† Lizhen Wang Aiqin Zhang Yanhua Song Xiaofeng Li Xingbing Wu Peipei Du Lv Yan

Henan Provincial Key Laboratory of Surface & Interface Science, Zhengzhou University of Light Industry, Zhengzhou 450002, China

Korean Journal of Chemical Engineering, February 2011, 28(2), 608-612(5), 10.1007/s11814-010-0396-z

Download PDF

Abstract

To improve the specific capacitance and energy density of electrochemical capacitor, nanostructured NiO was prepared by high temperature solid-state method as electrode material. The crystal structure and morphology of as-parepared NiO samples were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Cyclic voltammetry (CV) measurement was applied to investigate the specific capacitance of the NiO electrode. Furthermore, a novel mixed electrolyte consisting of NaOH, KOH, LiOH and Li2CO3 was prepared for the NiO capacitor, and the component and concentration of the four different electrolytes was examined by orthogonal test. The results showed that the NiO sample has cubic structure with nano-size particles, and the optimal composition of the electrolyte was: NaOH 2 mol L^(-1), KOH 3 mol L^(-1), LiOH 0.05 mol L^(-1), and Li2CO3 0.05 mol L^(-1). At a scan rate of 10 mV s^(-1), the fabricated capacitor exhibits excellent electrochemical capacitive performance, while the specific capacitance and the energy density were 239 F g^(-1) and 85 Wh kg^(-1), which was higher than one-component electrolyte.

Keywords

Mixed Electrolyte Nickel Oxide Orthogonal Test Optimal Composition

References

Zhang Y, Feng H, Wu X, Wang L, Zhang A, Xia T, Dong H, Li X, Zhang L, Int. J. Hydrogen Energy., 34, 4889 (2009)
Yamazaki S, Obata K, Okuhama Y, Matsuda Y, Yamagata M, Ishikawa M, J. Power Sources, 195(6), 1753 (2010)
Selvakumar M, Pitchumani S, Korean J. Chem. Eng., 27(3), 977 (2010)
Lee SW, Park DK, Lee JK, Ju JB, Sohn TW, Korean J. Chem. Eng., 18(3), 371 (2001)
Wang HY, Yoshio M, J. Power Sources, 195(4), 1263 (2010)
Yang CC, Wu GM, Mater. Chem. Phys., 114(2-3), 948 (2009)
Sharma RK, Zhai L, Electrochim. Acta, 54(27), 7148 (2009)
Liu Y, Zhao WW, Zhang XG, Electrochim. Acta, 53(8), 3296 (2008)
Sivakkumar SR, Ko JM, Kim DY, Kim BC, Wallace GG, Electrochim. Acta, 52(25), 7377 (2007)
Rios EC, Rosario AV, Mello RMQ, Micaroni L, J. Power Sources, 163(2), 1137 (2007)
Pico F, Ibanez J, Centeno TA, Pecharroman C, Rojas RM, Amarilla JM, Rojo JM, Electrochim. Acta, 51(22), 4693 (2006)
Wu MS, Hsieh HH, Electrochim. Acta, 53(8), 3427 (2008)
Wu MS, Huang YA, Yang CH, Jow JJ, Int. J. Hydrogen Energy., 32, 4153 (2007)
Sun GH, Li KX, Sun CG, J. Power Sources, 162(2), 1444 (2006)
Laheaar A, Kurig H, Janes A, Lust E, Electrochim. Acta, 54(19), 4587 (2009)
Tien CP, Liang WJ, Kuo PL, Teng HS, Electrochim. Acta, 53(13), 4505 (2008)
Wu MS, Huang CY, Lin KH, J. Power Sources, 186(2), 557 (2009)
Zhang FB, Zhou YK, Li HL, Mater. Chem. Phys., 83(2-3), 260 (2004)
Wang YG, Xia YY, Electrochim. Acta, 51(16), 3223 (2006)
Nohara S, Wada H, Furukawa N, Inoue H, Morita M, Iwakura C, Electrochim. Acta, 48(6), 749 (2003)