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Title: Iron Oxide-Decorated Carbon for Supercapacitor Anodes with Ultrahigh Energy Density and Outstanding Cycling Stability
Authors: Guan, Cao
Liu, Jilei
Wang, Yadong
Mao, Lu
Fan, Zhanxi
Shen, Zexiang
Zhang, Hua
Wang, John
Keywords: atomic layer deposition
cycling stability
Issue Date: 2015
Source: Guan, C., Liu, J., Wang, Y., Mao, L., Fan, Z., Shen, Z., et al. (2015). Iron Oxide-Decorated Carbon for Supercapacitor Anodes with Ultrahigh Energy Density and Outstanding Cycling Stability. ACS Nano, 9(5), 5198-5207.
Series/Report no.: ACS Nano
Abstract: Supercapacitor with ultrahigh energy density (e.g., comparable with those of rechargeable batteries) and long cycling ability (>50000 cycles) is attractive for the next-generation energy storage devices. The energy density of carbonaceous material electrodes can be effectively improved by combining with certain metal oxides/hydroxides, but many at the expenses of power density and long-time cycling stability. To achieve an optimized overall electrochemical performance, rationally designed electrode structures with proper control in metal oxide/carbon are highly desirable. Here we have successfully realized an ultrahigh-energy and long-life supercapacitor anode by developing a hierarchical graphite foam–carbon nanotube framework and coating the surface with a thin layer of iron oxide (GF–CNT@Fe2O3). The full cell of anode based on this structure gives rise to a high energy of ∼74.7 Wh/kg at a power of ∼1400 W/kg, and ∼95.4% of the capacitance can be retained after 50000 cycles of charge–discharge. These performance features are superior among those reported for metal oxide based supercapacitors, making it a promising candidate for the next generation of high-performance electrochemical energy storage.
ISSN: 1936-0851
DOI: 10.1021/acsnano.5b00582
Rights: © 2015 American Chemical Society.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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