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Novel three-dimensional (3D) concentration-gradient Ni-Co hydroxide nanostructures (3DCGNC) have been directly grown on nickel foam by a facile stepwise electrochemical deposition method and intensively investigated as binder- and conductor-free electrode for supercapacitors. Based on a three-electrode electrochemical characterization technique, the obtained 3DCGNC electrodes demonstrated a high specific capacitance of 1, 760 F·g-1 and a remarkable rate capability whereby more than 62.5% capacitance was retained when the current density was raised from 1 to 100 A·g-1. More importantly, asymmetric supercapacitors were assembled by using the obtained 3DCGNC as the cathode and Ketjenblack as a conventional activated carbon anode. The fabricated asymmetric supercapacitors exhibited very promising electrochemical performances with an excellent combination of high energy density of 103.0 Wh·kg-1 at a power density of 3.0 kW·kg-1, and excellent rate capability—energy densities of about 70.4 and 26.0 Wh·kg-1 were achieved when the average power densities were increased to 26.2 and 133.4 kW·kg-1, respectively. Moreover, an extremely stable cycling life with only 2.7% capacitance loss after 20, 000 cycles at a current density of 5 A·g-1 was achieved, which compares very well with the traditional doublelayer supercapacitors.
Aricò, A. S.; Bruce, P.; Scrosati, B.; Tarascon, J. M.; Van Schalkwijk, W. Nanostructured materials for advanced energy conversion and storage devices. Nat. Mater. 2005, 4, 366-377.
Huang, J. S.; Sumpter, B. G.; Meunier, V. Theoretical model for nanoporous carbon supercapacitors. Angew. Chem. Int. Ed. 2008, 47, 520-524.
Chen, P. C.; Chen, H. T.; Qiu, J.; Zhou, C. W. Inkjet printing of single-walled carbon nanotube/RuO2 nanowire supercapacitors on cloth fabrics and flexible substrates. Nano Res. 2010, 3, 594-603.
Fang, M.; Tan, X. L.; Liu, M.; Kang, S. H.; Hu, X. Y.; Zhang, L. D. Low-temperature synthesis of Mn3O4 hollow-tetrakaidecahedrons and their application in electrochemical capacitors. CrystEngComm 2011, 13, 4915-4920.
Selvan, R. K.; Perelshtein, I.; Perkas, N.; Gedanken, A. Synthesis of hexagonal-shaped SnO2 nanocrystals and SnO2@C nanocomposites for electrochemical redox supercapacitors. J. Phys. Chem. C 2008, 112, 1825-1830.
Wee, G.; Soh, H. Z.; Cheah, Y. L.; Mhaisalkar, S. G.; Srinivasan, M. Synthesis and electrochemical properties of electrospun V2O5 nanofibers as supercapacitor electrodes. J. Mater. Chem. 2010, 20, 6720-6725.
Cheng, H.; Lu, Z.G.; Deng, J.Q.; Chung, C.Y.; Zhang, K. L.; Li, Y. Y. A facile method to improve the high rate capability of Co3O4 nanowire array electrodes. Nano Res. 2010, 3, 895-901.
Lang, J. W.; Kong, L. B.; Wu, W. J.; Luo, Y. C.; Kang, L. Facile approach to prepare loose-packed NiO nano-flakes materials for supercapacitors. Chem. Commun. 2008, 44, 4213-4215.
Zhu, J. W.; Chen, S.; Zhou, H.; Wang, X. Fabrication of a low defect density graphene-nickel hydroxide nanosheet hybrid with enhanced electrochemical performance. Nano Res. 2012, 5, 11-19.
Du, H. M.; Jiao, L. F.; Wang, Q. H.; Yang, J. Q.; Guo, L. J.; Si, Y. C.; Wang, Y. J.; Yuan, H. T. Facile carbonaceous microsphere templated synthesis of Co3O4 hollow spheres and their electrochemical performance in supercapacitors. Nano Res. 2013, 6, 87-98.
Mondal, C.; Ganguly, M.; Manna, P. K.; Yusuf, S. M.; Pal, T. Fabrication of porous β-Co(OH)2 architecture at room temperature: A high performance supercapacitor. Langmuir 2013, 29, 9179-9187.
Wang, H. L.; Holt, C. M. B.; Li, Z.; Tan, X. H.; Amirkhiz, B. S.; Xu, Z. W.; Olsen, B. C.; Stephenson, T.; Mitlin, D. Graphene-nickel cobaltite nanocomposite asymmetrical supercapacitor with commercial level mass loading. Nano Res. 2012, 5, 605-617.
Xu, Y. X.; Huang, X. Q; Lin, Z.Y.; Zhong, X.; Huang, Y.; Duan, X. F. One-step strategy to graphene/Ni(OH)2 composite hydrogels as advanced three-dimensional supercapacitor electrode materials. Nano Res. 2013, 6, 65-76.
Lu, Z. Y.; Chang, Z.; Liu, J. F.; Sun, X. M. Stable ultrahigh specific capacitance of NiO nanorod arrays. Nano Res. 2011, 4, 658-665.
Bao, L. H.; Li, X. D. Towards textile energy storage from cotton T-shirts. Adv. Mater. 2012, 24, 3246-3252.
Huang, L.; Chen, D. C.; Ding, Y.; Feng, S.; Wang, Z. L.; Liu, M. L. Nickel-cobalt hydroxide nanosheets coated on NiCo2O4 nanowires grown on carbon fiber paper for high-performance pseudocapacitors. Nano Lett. 2013, 13, 3135-3139.
Yu, Z.Y.; Chen, L. F.; Yu, S. H. Growth of NiFe2O4 nanoparticles on carbon cloth for high performance flexible supercapacitors. J. Mater. Chem. A 2014, 2, 10889-10894.
Wang, S. B.; Pu, J.; Tong, Y.; Cheng, Y. Y.; Gao, Y.; Wang, Z. H. ZnCo2O4 nanowire arrays grown on nickel foam for high-performance pseudocapacitors. J. Mater. Chem. A 2014, 2, 5434-5440.
Yang, G. W.; Xu, C. L.; Li, H. L. Electrodeposited nickel hydroxide on nickel foam with ultrahigh capacitance. Chem. Commun. 2008, 48, 6537-6539.
Wang, Y. M.; Zhao, D. D.; Zhao, Y. Q.; Xu, C. L.; Li, H. L. Effect of electrodeposition temperature on the electrochemical performance of a Ni(OH)2 electrode. RSC Adv. 2012, 2, 1074-1082.
Yang, G. W.; Xu, C. L.; Li, H. L. Electrodeposited nickel hydroxide on nickel foam with ultrahigh capacitance. Chem. Commun. 2008, 44, 6537-6539.
Wang, H. L.; Holt, C. M. B.; Li, Z.; Tan, X. H.; Amirkhiz, B. S.; Xu, Z. W.; Olsen, B. C.; Stephenson, T.; Mitlin, D. Graphene-nickel cobaltite nanocomposite asymmetrical supercapacitor with commercial level mass loading. Nano Res. 2012, 5, 605-617.
Li, J. X.; Yang, M.; Wei, J. P.; Zhou, Z. Preparation and electrochemical performances of doughnut-like Ni(OH)2-Co(OH)2 composites as pseudocapacitor materials. Nanoscale 2012, 4, 4498-4503.
Lu, Z. Y.; Yang, Q.; Zhu, W.; Chang, Z.; Liu, J. F.; Sun, X. M.; Evans, D.; Duan, X. Hierarchical Co3O4@Ni-Co-O supercapacitor electrodes with ultrahigh specific capacitance per area. Nano Res. 2012, 5, 369-378.
Gupta, V.; Gupta, S.; Miura, N. Potentiostatically deposited nanostructured CoxNi1-x layered double hydroxides as electrode materials for redox-supercapacitors. J. Power Sources 2008, 175, 680-685.
Fan, Z. J.; Yan, J.; Wei, T.; Zhi, L. J.; Ning, G. Q.; Li, T. Y.; Wei, F. Asymmetric supercapacitors based on graphene/ MnO2 and activated carbon nanofiber electrodes with high power and energy density. Adv. Funct. Mater. 2011, 21, 2366-2375.
Yu, G. H.; Hu, L. B.; Liu, N. A.; Wang, H. L.; Vosgueritchian, M.; Yang, Y.; Cui, Y.; Bao, Z. N. Enhancing the supercapacitor performance of graphene/MnO2 nanostructured electrodes by conductive wrapping. Nano Lett. 2011, 11, 4438-4442.
Pan, G. X.; Xia, X.; Cao, F.; Tang, P. S.; Chen, H. F. Porous Co(OH)2/Ni composite nanoflake array for high performance supercapacitors. Electrochim. Acta 2012, 63, 335-340.
Lee, J. W.; Ahn, T.; Soundararajan, D.; Ko, J. M.; Kim, J. D. Non-aqueous approach to the preparation of reduced graphene oxide/α-Ni(OH)2 hybrid composites and their high capacitance behavior. Chem. Commun. 2011, 47, 6305-6307.
Ma, R.; Liang, J.; Takada, K.; Sasaki, T. Topochemical synthesis of Co-Fe layered double hydroxides at varied Fe/Co ratios: Unique intercalation of triiodide and its profound effect. J. Am. Chem. Soc. 2010, 133, 613-620.
Liang, J. B.; Ma, R. Z.; Iyi, N.; Ebina, Y.; Takada, K.; Sasaki, T. Topochemical synthesis, anion exchange, and exfoliation of Co-Ni layered doublehydroxides: A route to positively charged Co-Ni hydroxide nanosheets with tunable composition. Chem. Mater. 2009, 22, 371-378.
Wang, X.; Sumboja, A.; Lin, M. F.; Yan, J.; Lee, P. S. Enhancing electrochemical reaction sites in nickel-cobalt layered double hydroxides on zinc tin oxide nanowires: A hybrid material for an asymmetric supercapacitor device. Nanoscale 2012, 4, 7266-7272.
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