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Issue 27, 2011
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Effect of heat-treatment process on FeF3 nanocomposite electrodes for rechargeable Li batteries

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Abstract

An FeF3 nanocomposite with carbon materials is prepared by a ball milling process. The effect of the strain induced by ball milling on the electrochemical performance is examined using a combination of synchrotron X-ray diffraction (SXRD) and X-ray absorption spectroscopy (XAS). The strain of the FeF3 particles in the nanocomposite is analyzed by applying the Williamson–Hall method to the SXRD patterns. Heat-treatmenting the FeF3 nanocomposite drastically relieves the strain induced by the ball milling. The electrochemical performance of the FeF3 nanocomposite is also significantly improved by the heat-treatment process at 350 °C. The FeF3 nanocomposite heat-treated at 350 °C delivers 200 mA h g−1 of reversible capacity with good capacity retention in a voltage range of 2.0–4.5 V. The heat-treatment process suppresses the increase in the poralization during the continuous cycling test. The power density of the heat-treated sample is superior to that of the ball milled sample without the heat treatment.

Graphical abstract: Effect of heat-treatment process on FeF3 nanocomposite electrodes for rechargeable Li batteries

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Publication details

The article was received on 04 Dec 2010, accepted on 16 Feb 2011 and first published on 14 Mar 2011


Article type: Paper
DOI: 10.1039/C0JM04231E
Citation: J. Mater. Chem., 2011,21, 10035-10041
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    Effect of heat-treatment process on FeF3 nanocomposite electrodes for rechargeable Li batteries

    N. Yabuuchi, M. Sugano, Y. Yamakawa, I. Nakai, K. Sakamoto, H. Muramatsu and S. Komaba, J. Mater. Chem., 2011, 21, 10035
    DOI: 10.1039/C0JM04231E

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