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http://dx.doi.org/10.9713/kcer.2012.50.4.754

Electrochemical Characterization of Porous Graphene Film for Supercapacitor Electrode  

Choi, Bong Gill (Dapartment of Chemical & Biomolecular Engineering (BK21 program), KAIST)
Huh, Yun Suk (Division of Material Science, Korea Basic Science Institute)
Hong, Won Hi (Dapartment of Chemical & Biomolecular Engineering (BK21 program), KAIST)
Publication Information
Korean Chemical Engineering Research / v.50, no.4, 2012 , pp. 754-757 More about this Journal
Abstract
In this report, we fabricate the porous graphene films through embossing process and vacuum filtration method and demonstrate their superior electrochemical properties as supercapacitor electrode materials. Insertion/removal of polystyrene nanoparticles between the graphene sheets allows to provide pore structures, leading to the effective prevention of restacking in graphene films. As-prepared porous graphene films have a large surface area, a bicontinuous porous structures, high electrical conductivity, and excellent mechanical integrity. The electrochemical properties of the porous graphene films as electrode materials of supercapacitor are investigated by using aqueous $H_2SO_4$ and ionic liquid solution under three-electrode system. The porous graphene films exhibit a high specific capacitance (284.5 F/g), which is two-fold higher than that of packing graphene films (138.9 F/g). In addition, the rate capability (98.7% retention) and long-term cycling stability (97.2%) for the porous graphene films are significantly enhanced, due to the facilitated ion mobility between the graphene layers.
Keywords
Supercapacitor; Graphene; Electrochemistry; Film; Polystyrene;
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1 Armaroli, N. and Balzani, V., "Towards an Electricity-Powered World," Energy Environ. Sci., 4, 3193-3222(2011).   DOI   ScienceOn
2 Miller, J. R. and Burke, A. F., "Electrochemical Capacitors: Challenges and Opportunities for Real-World Applications," Electrochem. Soc. Interface, 17, 53-57(2008).
3 Hall, P. J., Mirzaeian, M. Fletcher, S. I., Sillars, F. B., Rennie, A. J. R., Shitta-Bey, G. O., Wilson, G., Cruden, A. and Carter. R., "Energy Storage in Electrochemical Capacitors: Designing Functional Materials to Improve Performance," Energy Environ. Sci., 3, 1238-1251(2010).   DOI   ScienceOn
4 Simon, P. and Gogotsi, Y., "Materials for Electrochemical Capacitors," Nat. Mater., 7, 845-854(2008).   DOI   ScienceOn
5 Sun, Y., Wu, Q. and Shi, G., "Graphene Based New Energy Materials," Energy Environ. Sci., 4, 1113-1132(2011).   DOI   ScienceOn
6 Stoller, M. D., Park, S., Zhu, Y., An, J. and Ruoff, R. S., "Graphene- Based Ultracapacitors," Nano Lett., 8, 3498-3502(2008).   DOI   ScienceOn
7 Zhu, Y., Murali, S., Cai, W., Li, X., Suk, J. W., Potts, J. R. and Ruoff, R. S., "Graphene and Graphene Oxide: Synthesis, Properties, and Applications, Adv. Mater., 22, 3906-3924(2010).   DOI   ScienceOn
8 Miller, J. R., Outlaw, R. A. and Holloway, B. C., "Graphene Double- Layer Capacitor with ac Line-Filtering Performance," Science, 329, 1637-1639(2010).   DOI   ScienceOn
9 Hummers, W. S. and Offeman, R. E., "Preparation of Graphitic Oxide," J. Am. Chem. Soc., 80, 1339(1958).   DOI
10 Zhang, L. L. and Zhao, X. S., "Carbon-Based Materials as Supercapacitor Electrodes," Chem. Soc. Rev., 38, 2520-2531(2009).   DOI   ScienceOn
11 Hong, J., Char, K. and Kim, B.-S., "Hollow Capsules of Reduced Graphene Oxide Nanosheets Assembled on a Sacrificial Colloidal Particle," J. Phys. Chem. Lett., 1, 3442-3445(2010).   DOI   ScienceOn
12 Kim, T. Y., Lee, H. W., Stoller, M., Dreyer, D. R., Bielawski, C. W., Ruoff, R. S. and Suh, K. S., "High-Performance Supercapacitors Based on Poly(ionic liquid)-Modified Graphene Electrodes," ACS Nano, 5, 436-442(2011).   DOI   ScienceOn
13 Chen, P.-C., Shen, G., Shi, Y., Chen, H. and Zhou, C., "Preparation and Characterization of Flexible Asymmetric Supercapacitors Based on Transition-Metal-Oxide Nanowire/Single Walled Carbon Nanotube Hybrid Thin-Film Electrodes," ACS Nano, 4, 4403-4411(2010).   DOI   ScienceOn
14 Li, Z., Mi, Y., Liu, X., Yang, S. and Wang, J., "Flexible Graphene/$MnO_2$Composite Papers for Supercapacitor Electrodes," J. Mater. Chem., 21, 14706-14711(2011).   DOI   ScienceOn
15 Choi, B. G., Hong, J., Hong, W. H., Hammond, P. T. and Park, H., "Facilitated Ion Transport in All-Solid-State Flexible Supercapacitors," ACS Nano, 5, 7205-7213(2011).   DOI   ScienceOn