Abstract：According to the molar ratio of 1∶1 using potassium persulfate (K2S2O8) and manganese sulfate monohydrate (MnSO4瘙簚H2O) as raw materials and dissolved in deionized water , carbon nanotubes(CNTs) dissolved manganese sulfate solution will account for 5% of the total mass, and according to the proportion of GO∶CNTs=1∶10 to add graphene oxide(GO), adjust the pH value of the mixed solution to 1, α-MnO2-CNTs-GO composites prepared by drying at 110 ℃. By transmission electron microscopy (TEM), the mechanism of the dispersion of graphene oxide(GO) by carbon nanotubes(CNTs) was analyzed. The analysis results show that oxidation in accordance with the quality of graphene oxide(GO) and carbon nanotubes(CNTs) than 1∶10 after adding amount to join, can improve the dispersion effect of carbon nanotubes(CNTs) in manganese dioxide, can further improve its electrochemical properties. The electrode power density of the electrode is greatly improved compared with the pureα-MnO2.
[1] Sarangepani S,Tilak B V,Chen C P. Materials for Electrochemical Capacitors Theoretical and Experimental Constraints[J]．Electrochem．Soc,1996, 143(11)：3791-3799[2]张治安,邓梅根,胡永达等.电化学电容器的特点及应用.电子元件与材料,2003,22(11):2-5[3]Gogotsi Y,Simon P. True Performance Metrics in Electrochemical Energy Storage. Science,2011,334:917-918[4] CHE G,LAKSHML B B,FLSHER E R．Carbon nanotubue membranes for electrochemical energy storage and production [J]．Nature,1998，393：346-349[5] Novoselov K S, Geim A K, Morozov S V, et al. Electric field effect in atomically thin carbon films. Science 2004, 306, 666–669[6] Pumera M, Ambrosi A, Bonanni A, et al. Graphene f,or electrochemical sensing and biosensing. Chemistry, 2010, 29, 954–965 [7] Shao Y Y, Wang J, Wu H, Liu J, et al. Graphene Based Electrochemical Sensors and Biosensors: A Review. Electroanalysis, 2010, 22, 1027–1036[8] Stoller M D, Park S J, Zhu Y W, et al. Graphene-Based Ultracapacitors. Nano Letters, 2008, 8, 3498-3502[9] Chen C M, Yang Q H, Yang Y G, et al. Self-Assembled Free-Standing Graphite Oxide Membrane. Advanced Materials, 2009, 21, 3007–3011[10] Dreyer S, Park C W, Bielawski R S. The chemistry of graphene oxide. Chemical Society Review, 2010, 39, 228-240[11] Laura J C, Franklin K, Huang J X. Langmuir-Blodgett Assembly of Graphite Oxide Single Layers. Journal of American Chemical Society, 2009, 131, 1043-1049[12] Salzmann C G, Llewellyn S A, Tobias G, et al. The role of carboxylated carbonaceous fragments in the functionalization and spectroscopy of a single-walled carbon-nanotube material. Advanced Materials, 2007, 19(6): 883-887 [13] Qiu L, Yang X W, Gou X L, et al. Dispersing Carbon Nanotubes with GrapHene Oxide in Water and Synergistic Effects between Graphene Derivatives. Chemistry a European Journal, 2010, 16, 10653-10658[14] Hu C C, Wang T, Tsou. Ideal capacitive behavior of hydrous manganese oxide prepared by anodic deposition. Electrochemistry Communications, 2002, 4, 105-109[15] Ouassim G, Jean-Louis P. Microstructural Effects on Charge-Storage Properties in MnO2-Based Electrochemical Supercapacitors. Applied Material & Interfaces, 2009, 1(5): 1130–1139[16] 梁逵，陈艾，冯哲圣等. 碳纳米管电极超大容量离子电容器交流阻抗特性. 物理化学学报，2002,18(4)：381-384
2016, Vol. 23 
