کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9760332 | 1498046 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Lithium intercalation into α-Fe2O3 obtained by mechanical milling of α-FeOOH
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Lithium intercalation into α-Fe2O3 obtained by mechanical milling of α-FeOOH Lithium intercalation into α-Fe2O3 obtained by mechanical milling of α-FeOOH](/preview/png/9760332.png)
چکیده انگلیسی
Crystalline α-Fe2O3 powder was prepared by the mechanical milling of crystalline α-FeOOH at room temperature in air. This result means that crystalline α-FeOOH is dehydrated by mechanical milling at room temperature. The obtained α-Fe2O3 powder worked as a rechargeable electrode material in lithium ion conductive organic electrolytes. The electrodes exhibited high discharge capacities of over 1000 mAh gâ1 corresponding to 6 Li per α-Fe2O3 at potentials ranging from the open circuit potential to 0.5 V (versus Li+/Li) in the first discharging (lithium insertion) process. This suggests that the valence deviation from Fe3+ in α-Fe2O3 to Fe0 may be caused by electrochemical reduction. In contrast, after the first discharge, the electrodes exhibited high charge capacities of more than 700 mAh gâ1 corresponding to 4.2 Li per α-Fe2O3 in the first charging (lithium extraction) process. The coulombic efficiency at the first cycle was about 70%, suggesting a valence deviation from Fe0 to Fe2+ or Fe3+ caused by electrochemical oxidation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 146, Issues 1â2, 26 August 2005, Pages 315-318
Journal: Journal of Power Sources - Volume 146, Issues 1â2, 26 August 2005, Pages 315-318
نویسندگان
Hideyuki Morimoto, Shin-ichi Tobishima, Yumiko Iizuka,