REAEARCH PAPER |
|
|
|
|
|
Electrochemical Capacitive Properties of Coal-based Three-dimensional Graphene Electrode in Different Electrolytes |
ZHANG Yating1, REN Shaozhao1, DANG Yongqiang1, LIU Guoyang1, LI Keke1, ZHOU Anning1, QIU Jieshan2
|
1 College of Chemistry and Chemical Engineering, Xi’an University of Science and Technology, Xi’an 710054; 2 School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an 710049 |
|
|
Abstract 3D graphene holds promise as electrode materials for electric double layer capacitors due to its unique porous network structure, large specific surface area and excellent optical, electrical, thermal and mechanical properties. In this paper, 3D coal-based graphene (3D-CG) was prepared from coal by a combined technique involving the catalytic thermal treatment, modified Hummers method and one-step hydrothermal self-assembly method. The morphologies and structures of the samples were examined by TEM, SEM, XRD, FT-IR and Raman spectroscopy. Furthermore, the electrochemical properties of 3D-CG materials in 6 mol/L KOH, 1 mol/L H2SO4 and 1 mol/L Na2SO4 electrolyte were systematically studied by galvanostatic charge-discharge (GCD), cyclic voltammetry (CV) and electrochemical impedance spectra (EIS) tests. The results indicated the good capacitive performance and stability of 3D-CG, as the specific capacitance was 288.9 F/g in 6 mol/L KOH aqueous electrolyte, with a high retention ratio of 91.6% even after 1 000 cycles.
|
Published: 07 May 2018
|
|
|
|
1 Novoselov K S, Firsov A A. Electric field effect in atomically thin carbon films[J]. Science,2004,306(5696):666. 2 Wan W, Li L, Zhao Z, et al. Graphene oxide: Ultrafast fabrication of covalently cross-linked multifunctional graphene oxide monoliths[J]. Adv Funct Mater,2014,24(31):4915. 3 Wu Z S, Zhou G, Yin L C, et al. Graphene/metal oxide composite electrode materials for energy storage[J]. Nano Energy,2012,1(1):107. 4 Hu H, Zhao Z, Zhou Q, et al. The role of microwave absorption on formation of graphene from graphite oxide[J]. Carbon,2012,50(9):3267. 5 Vivekchand S R C, Rout C S, Subrahmanyam K S, et al. Graphene-based electrochemical supercapacitors[J]. J Chem Sci,2008,120(1):9. 6 Fu C, Kuang Y, Huang Z, et al. Supercapacitor based on graphene and ionic liquid electrolyte[J]. J Solid State Electrochem,2011,15(11-12):2581. 7 Zhang K, et al. Surfactant-intercalated, chemically reduced graphene oxide for high performance supercapacitor electrodes[J]. J Mater Chem,2011,21(20):7302. 8 Ma Y, Chen Y. Three-dimensional graphene networks: Synthesis, properties and applications[J]. National Sci Rev,2015,2(1):40. 9 Nardecchia S, Carriazo D, Ferrer M L, et al. Three dimensional macroporous architectures and aerogels built of carbon nanotubes and/or graphene: Synthesis and applications[J]. Chem Soc Rev,2013,42(2):794. 10 Zhang Y T, Zhou A N, Zhang X Q, et al. Preparation of the graphene from Taixi anthracite[J]. Coal Convers,2013,36(4):57(in Chinese). 张亚婷, 周安宁, 张晓欠,等. 以太西无烟煤为前驱体制备煤基石墨烯的研究[J]. 煤炭转化,2013,36(4):57. 11 Tuinstra F, Koenig J L. Raman spectrum of graphite[J]. J Chem Phys,2003,53(3):1126. 12 Roldán S, Blanco C, Granda M, et al. Towards a further generation of high-energy carbon-based capacitors by using redox-active electrolytes[J]. Angew Chem Int Ed,2011,50(7):1699. 13 Wang C, Sun L, Zhou Y, et al. P/N co-doped microporous carbons from H3PO4-doped polyaniline by in situ, activation for supercapacitors[J]. Carbon,2013,59(7):537. 14 Wu H Y, Zhang H Y, Zhang F H, et al. Synthesis of SnO2/RGO/PANI ternary composites and its electrochemical behaviors[J]. Mater Rev:Res,2012,26(11):54(in Chinese). 吴红英, 张海英, 张富海,等. SnO2/还原氧化石墨烯/聚苯胺三元复合物的合成及电化学性能[J]. 材料导报:研究篇,2012,26(11):54. 15 Sun H, et al. Bacteria promoted hierarchical carbon materials for high-performance supercapacitor[J]. Energy Environ Sci,2012,5(3):6206. 16 Niu Z, Luan P, Shao Q, et al. A “skeleton/skin” strategy for preparing ultrathin free-standing single-walled carbon nanotube/polya-niline films for high performance supercapacitor electrodes[J]. Energy Environ Sci,2012,5(9):8726. 17 Ji H, Zhang L, Pettes M T, et al. Ultrathin graphite foam: A three-dimensional conductive network for battery electrodes[J]. Nano Lett,2012,12(5):2446. 18 Liu W W, Feng Y Q, Yan X B, et al. Superior micro-supercapacitors based on graphene quantum dots[J]. Adv Funct Mater,2013,23(33):4111. 19 Trudeau M L, et al. Advanced materials for energy storage[J]. Adv Mater,2010,22(8):28. 20 Chang Z, Wang H W, Hu Z A, et al. Synthesis of graphene with oxygen-containing functional groups via thermal expension and its electrochemical capacitive performances[J]. Mater Rev:Res,2012,26(9):49(in Chinese). 常郑, 王欢文, 胡中爱,等. 热膨胀制备含氧官能团化的石墨烯及其电化学电容性能[J]. 材料导报:研究篇,2012,26(9):49. 21 Huang Z N, Kou S Z, Jin D D, et al. Performance of Ni(OH)2/reduced graphene oxides composites for supercapacitors[J]. J Funct Mater,2015(5):5084(in Chinese). 黄振楠, 寇生中, 金东东,等. 氢氧化镍/还原氧化石墨烯复合物的超级电容性能[J]. 功能材料,2015(5):5084. 22 Dong L, Xu C, Yang Q, et al. High-performance compressible supercapacitors based on functionally synergic multiscale carbon composite textiles[J]. J Mater Chem A,2015,3(8):4729. |
|
|
|