Journal
JOURNAL OF POWER SOURCES
Volume 230, Issue -, Pages 44-49Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2012.11.125
Keywords
Ferrocene; Metallocene; Iron oxide; Carbon coating; Lithium-ion battery
Funding
- university of Munster
- Ministry of Innovation, Science and Research of North Rhine-Westphalia (MIWF) within the project Superkondensator und Lithium-Ionen-Hybrid-Superkondensatoren auf der Basis ionischer Flussigkeiten
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Ferrocene can be used as a precursor for the synthesis of carbon-coated alpha-Fe2O3 nano-particles. The pyrolysis of ferrocene leads to the formation of a compound that can be fully converted into carbon-coated alpha-Fe2O3 cc nano-particles via a simple oxidation in air. This simple, fast and cheap synthetic route enables the realization of carbon-coated nano-particles with particle size in the range of 50-150 nm. Moreover, varying the oxidation temperature, it is possible to control precisely the carbon coating present on the nano-particles. The so obtained carbon-coated alpha-Fe2O3 nano-particles can be easily processed in water to realize composite electrodes with a composition suitable for practical application. When used in combination with conventional electrolytes such electrodes display high specific capacity (over 800 mAh g(-1) at 0.13 A g(-1)), excellent cycling retention (higher than 99% after 50 cycles), and remarkable rate performance (over 400 mAh g(-1) at 5 A g(-1)). (C) 2012 Elsevier B.V. All rights reserved.
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