Anchoring Hydrous RuO2 on Graphene Sheets for High-Performance Electrochemical Capacitors
作者： Zhong-Shuai Wu , Da-Wei Wang , Wencai Ren , Jinping Zhao , Guangmin Zhou
关键词:
摘要: Hydrous ruthenium oxide (RuO 2 )/graphene sheet composites (ROGSCs) with different loadings of Ru are prepared by combining sol–gel and low-temperature annealing processes. The graphene sheets (GSs) well-separated fi ne RuO particles (5–20 nm) and, simultaneously, the anchored richly oxygen-containing functional groups reduced, chemically exfoliated GSs onto their surface. Benefi ts from combined advantages in such a unique structure that ROGSC-based supercapacitors exhibit high specifi c capacitance ( ∼ 570 F g − 1 for 38.3 wt% loading), enhanced rate capability, excellent electrochemical stability 97.9% retention after 1000 cycles), energy density (20.1 Wh kg ) at low operation (100 mA or power (10000 W reasonable (4.3 ). Interestingly, total ROGSCs is higher than sum capacitances pure relative ratios, which indicative positive synergistic effect on improvement performance. These ndings demonstrate importance great potential graphenebased development high-performance energy-storage systems.
uq.edu.au
core.ac.uk参考文章(49)
Kyung-Won Park, Bu-Kil Kwon, Jong-Ho Choi, In-Su Park, Young-Min Kim, Yung-Eun Sung, New RuO2 and carbon–RuO2 composite diffusion layer for use in direct methanol fuel cells Journal of Power Sources. ,vol. 109, pp. 439- 445 ,(2002) , 10.1016/S0378-7753(02)00100-3
B. E. Conway, W. G. Pell, Double-layer and pseudocapacitance types of electrochemical capacitors and their applications to the development of hybrid devices Journal of Solid State Electrochemistry. ,vol. 7, pp. 637- 644 ,(2003) , 10.1007/S10008-003-0395-7
Chi-Chang Hu, Wei-Chun Chen, Kuo-Hsin Chang, How to Achieve Maximum Utilization of Hydrous Ruthenium Oxide for Supercapacitors Journal of The Electrochemical Society. ,vol. 151, ,(2004) , 10.1149/1.1639020
Girish Arabale, Deepali Wagh, Mahesh Kulkarni, I.S Mulla, S.P Vernekar, K Vijayamohanan, A.M Rao, Enhanced supercapacitance of multiwalled carbon nanotubes functionalized with ruthenium oxide Chemical Physics Letters. ,vol. 376, pp. 207- 213 ,(2003) , 10.1016/S0009-2614(03)00946-1
Yongchao Si, Edward T. Samulski, Exfoliated Graphene Separated by Platinum Nanoparticles Chemistry of Materials. ,vol. 20, pp. 6792- 6797 ,(2008) , 10.1021/CM801356A
Yue-feng SU, Feng WU, Li-ying BAO, Zhao-hui YANG, RuO2/activated carbon composites as a positive electrode in an alkaline electrochemical capacitor New Carbon Materials. ,vol. 22, pp. 53- 57 ,(2007) , 10.1016/S1872-5805(07)60007-9
Jong H. Jang, Sangjin Han, Taeghwan Hyeon, Seung M. Oh, Erratum to “Electrochemical capacitor performance of hydrous ruthenium oxide/mesoporous carbon composite electrodes” [J. Power Sources 123 (2003) 79–85] Journal of Power Sources. ,vol. 124, pp. 596- 596 ,(2003) , 10.1016/J.JPOWSOUR.2003.08.006
Seung-Min Paek, EunJoo Yoo, Itaru Honma, Enhanced Cyclic Performance and Lithium Storage Capacity of SnO2/Graphene Nanoporous Electrodes with Three-Dimensionally Delaminated Flexible Structure Nano Letters. ,vol. 9, pp. 72- 75 ,(2009) , 10.1021/NL802484W
Kay Hyeok An, Kwan Ku Jeon, Jeong Ku Heo, Seong Chu Lim, Dong Jae Bae, Young Hee Lee, High-Capacitance Supercapacitor Using a Nanocomposite Electrode of Single-Walled Carbon Nanotube and Polypyrrole Journal of The Electrochemical Society. ,vol. 149, ,(2002) , 10.1149/1.1491235
Guoxiu Wang, Juan Yang, Jinsoo Park, Xinglong Gou, Bei Wang, Hao Liu, Jane Yao, FACILE SYNTHESIS AND CHARACTERIZATION OF GRAPHENE NANOSHEETS Journal of Physical Chemistry C. ,vol. 112, pp. 8192- 8195 ,(2008) , 10.1021/JP710931H