1. Key Lab of Surface and Interface Sciences of Henan Provincial, Zhengzhou University of Light Industry, Zhengzhou 450002, China; 2. Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China; 3. College of Chemistry and Chemical Engineering, Graduate University of Chinese Academy of Sciences, Beijing 100049, China; 4. Laboratory of Advanced Polymer Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
An?effective?method?was?used?to produce stable and homogeneous colloidal suspensions of highly reduced graphene oxide (RGO) in N,N-dimethylformamide (DMF) without the assistance of dispersing agents. According to the results of general characterization, relatively pure graphene sheets with the morphology of single layer or few-layer structure were obtained. Then nanocomposite powders of RGO and poly(vinylidene fluoride) (PVDF) were prepared by vacuum filtration of the mixed dispersions of both components. The nanocomposites exhibit a high-frequency capacitative response with small equivalent series resistance (ESR) at 0.4 Ω, a nearly rectangular cyclic voltammogram and possess a rapid current response as electrodes for supercapacitor in 5 mol/L KOH electrolyte. Furthermore, after 600 galvanostatic charge/discharge cycles, the supercapacitor still performs a very high stability and efficiency of capacitance.
Pandolfo A G, Hollenkamp A F. Carbon properties and their role in supercapacitors. Journal of Power Sources , 2006, 157(1): 11-27
2
Miller J R, Simon P. Electrochemical capacitors for energy management. Science , 2008, 321(5889): 651-652
3
Wang Y, Shi Z Q, Huang Y, . Supercapacitor devices based on graphene materials. The Journal of Physical Chemistry C , 2009, 113(30): 13103-13107
4
Stoller M D, Park S J, Zhu Y W, . Graphene-based ultracapacitors. Nano Letters , 2008, 8(10): 3498-3502
5
Si Y C, Samulski E T. Exfoliated graphene separated by platinum nanoparticles. Chemistry of Materials , 2008, 20(21): 6792-6797
6
Yoo E J, Kim J, Hosono E, . Large reversible Li storage of graphene nanosheet families for use in rechargeable lithium ion batteries. Nano Letters , 2008, 8(8): 2277-2282
7
Xu C, Wang X, Zhu J W. Graphene - metal particle nanocomposites. The Journal of Physical Chemistry C , 2008, 112(50): 19841-19845
8
Wang D H, Kou R, Choi D, . Ternary self-assembly of ordered metal oxide-graphene nanocomposites for electrochemical energy storage. ACS Nano , 2010, 4(3): 1587-1595
9
Zhang K, Zhang L L, Zhao X S, . Graphene/polyaniline nanofiber composites as supercapacitor electrodes. Chemistry of Materials , 2010, 22(4): 1392-1401
10
Zhang D C, Zhang X, Chen Y, . Enhanced capacitance and rate capability of graphene/polypyrrole composite as electrode material for supercapacitors. Journal of Power Sources , 2011, 196(14): 5990-5996
11
Vignali M, Edwards R A H, Serantoni M, . Electropolymerized polythiophene layer extracted from the interface between two immiscible electrolyte solutions: Current–time analysis. Journal of Electroanalytical Chemistry , 2006, 591(1): 59-68
12
Jang J. Conducting polymer nanomaterials and their applications. Advances in Polymer Science , 2006, 199: 189-260
13
Zhou Y K, He B L, Zhou W J, . Preparation and electrochemistry of SWNT/PANI composite films for electrochemical capacitors. Journal of the Electrochemical Society , 2004, 151(7): A1052-A1057
14
Hu C-C, Chu C-H. Electrochemical and textural characterization of iridium-doped polyaniline films for electrochemical capacitors. Materials Chemistry and Physics , 2000, 65(3): 329-338
15
Ryu K S, Kim K M, Park N G, . Symmetric redox supercapacitor with conducting polyaniline electrodes. Journal of Power Sources , 2002, 103(2): 305-309
16
Khomenko V, Frackowiak E, Béguin F. Determination of the specific capacitance of conducting polymer/nanotubes composite electrodes using different cell configurations. Electrochimica Acta , 2005, 50(12): 2499-2506
17
Li L X, Song H H, Zhang Q C, . Effect of compounding process on the structure and electrochemical properties of ordered mesoporous carbon/polyaniline composites as electrodes for supercapacitors. Power Source , 2009, 187(1): 268-274
18
Benz M, Euler W B, Gregory O J. The role of solution phase water on the deposition of thin films of poly(vinylidene fluoride). Macromolecules , 2002, 35(7): 2682-2688
19
Lin D-J, Chang H-H, Beltsios K, . Effect of postcasting heat-treatment on the structure and properties of semicrystalline phase-inversion poly(vinylidene fluoride) membranes. Journal of Polymer Science Part B: Polymer Physics , 2009, 47(19): 1880-1893
20
Hummers W S Jr, Offeman R E. Preparation of graphitic oxide. Journal of the American Chemical Society , 1958, 80(6): 1339
21
Park S J, An J, Jung I, . Colloidal suspensions of highly reduced graphene oxide in a wide variety of organic solvents. Nano Letters , 2009, 9(4): 1593-1597
22
Conway B E. Electrochemical Supercapacitors: Scientific Fundamentals and Technological Applications. New York: Kluwer Academic/Plenum Press, 1999
23
Titelman G I, Gelman V, Bron S, . Characteristics and microstructure of aqueous colloidal dispersions of graphite oxide. Carbon , 2005, 43(3): 641-649
24
Wu Z S, Ren W C, Gao L B, . Synthesis of high-quality graphene with a pre-determined number of layers. Carbon , 2009, 47(2): 493-499
25
Stankovich S, Dikin D A, Piner R D, . Synthesis of graphene-based nanosheets via chemical reduction of exfoliated graphite oxide. Carbon , 2007, 45(7): 1558-1565
26
Becerril H A, Mao J, Liu Z, . Evaluation of solution-processed reduced graphene oxide films as transparent conductors. ACS Nano , 2008, 2(3): 463-470
27
Wang H L, Robinson J T, Li X L, . Solvothermal reduction of chemically exfoliated graphene sheets. Journal of the American Chemical Society , 2009, 131(29): 9910-9911
28
Sun Z Z, Yan Z, Yao J, . Growth of graphene from solid carbon sources. Nature , 2010, 468(7323): 549-552
29
Wang C, Li D, Too C O, . Electrochemical properties of graphene paper electrodes used in lithium batteries. Chemistry of Materials , 2009, 21(13): 2604-2606
30
Liao K H, Mittal A, Bose S, . Aqueous only route toward graphene from graphite oxide. ACS Nano , 2011, 5(2): 1253-1258
31
Chen S, Zhu J W, Wu X D, . Graphene oxide–MnO2 nanocomposites for supercapacitors. ACS Nano , 2010, 4(5): 2822-2830
32
Zhang J, Lee J-K, Wu Y, . Photoluminescence and electronic interaction of anthracene derivatives adsorbed on sidewalls of single-walled carbon nanotubes. Nano Letters , 2003, 3(3): 403-407
33
Byl O, Kondratyuk P, Forth S T, . Adsorption of CF4 on the internal and external surfaces of opened single-walled carbon nanotubes: a vibrational spectroscopy study. Journal of the American Chemical Society , 2003, 125(19): 5889-5896
34
Li H P, Zhou B, Lin Y, . Selective interactions of porphyrins with semiconducting single-walled carbon nanotubes. Journal of the American Chemical Society , 2004, 126(4): 1014-1015
35
Zhao J J, Lu J P, Han J, . Noncovalent functionalization of carbon nanotubes by aromatic organic molecules. Applied Physics Letters , 2003, 82(21): 3746-3748
36
Guo C X, Li C M. A self-assembled hierarchical nanostructure comprising carbon spheres and graphene nanosheets for enhanced supercapacitor performance. Energy & Environmental Science , 2011, 4(11): 4504-4507
37
Guo C X, Yang H B, Sheng Z M, . Layered graphene/quantum dots for photovoltaic devices. Angewandte Chemie International Edition , 2010, 49(17): 3014-3017
38
Gregorio R Jr. Determination of the α, β, and γ crystalline phases of poly(vinylidene fluoride) films prepared at different conditions. Journal of Applied Polymer Science , 2006, 100(4): 3272-3279
39
Conway B E, Pell W G. Double-layer and pseudocapacitance types of electrochemical capacitors and their applications to the development of hybrid devices. Journal of Solid State Electrochemistry , 2003, 7(9): 637-644
40
Simon P, Gogotsi Y. Materials for electrochemical capacitors. Nature Materials , 2008, 7(11): 845-854
41
Li F H, Song J F, Yang H F, . One-step synthesis of graphene/SnO2 nanocomposites and its application in electrochemical supercapacitors. Nanotechnology , 2009, 20(45): 455602 (6 pages)
42
Sugimoto W, Iwata H, Yokoshima K, . Proton and electron conductivity in hydrous ruthenium oxides evaluated by electrochemical impedance spectroscopy: the origin of large capacitance. The Journal of Physical Chemistry B , 2005, 109(15): 7330-7338
43
Park S, An J, Piner R D, . Aqueous suspension and characterization of chemically modified graphene sheets. Chemistry of Materials , 2008, 20(21): 6592-6594
44
Zhang K, Mao L, Zhang L L, . Surfactant-intercalated, chemically reduced graphene oxide for high performance supercapacitor electrodes. Journal of Materials Chemistry , 2011, 21(20): 7302-7307
45
Biswas S, Drzal L T. Multilayered nano-architecture of variable sized graphene nanosheets for enhanced supercapacitor electrode performance. ACS Applied Materials & Interfaces , 2010, 2(8): 2293-2300
