Journal
MATERIALS LETTERS
Volume 80, Issue -, Pages 121-123Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2012.03.087
Keywords
Fe2O3; Nanocomposites; Carbon materials; Supercapacitors
Funding
- NSF of Tianjin [10JCZDJC21500]
- State Key Lab of Inorganic Synthesis and Preparative Chemistry of Jilin University
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Fe2O3@C nanocomposites (denoted as FeC-n, n represents the weight percent of Fe(NO3)(3)center dot 9H(2)O in the starting gel) have been fabricated by pyrolyzing Fe(NO3)(3)center dot 9H(2)O impregnated starch gels. When the Fe(NO3)(3)center dot 9H(2)O content was below 50 wt.%, the products contained well dispersive and uniform gamma-Fe2O3 nanoparticles that embedded in the carbon matrix. The particle sizes were positively related to the content of Fe(NO3)(3)center dot 9H(2)O. The nanocomposites FeC-50 that contained 4.25 nm nanoparticles exhibited an enhanced electrochemical performance within the voltage window of -1.3-0.4 V in 6 mol L-1 KOH solutions. The symmetric capacitor of FeC-50 possessed a high specific capacitance (SC) of 267.2 F g(-1) at 0.35 A g(-1) with a high voltage of 1.4 V. (C) 2012 Published by Elsevier B.V.
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