کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1291190 973348 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A new ternary Li4FeSb2 structure formed upon discharge of the FeSb2/Li cell
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
A new ternary Li4FeSb2 structure formed upon discharge of the FeSb2/Li cell
چکیده انگلیسی

We report here the performance of FeSb2 used as negative electrode for Li-ions batteries. A capacity of 400 mAh g−1 and 3500 mAh cm−3 can be retained after 10 cycles at a C/10 cycling rate. We studied in particular the electrochemical mechanism during the first discharge of the FeSb2/Li battery. Both Mössbauer spectroscopy (57Fe and 121Sb) and in situ XRD studies show the formation of an unknown fcc-phase during the first step. A second step shows the conversion process leading to Li3Sb at the end of the discharge. The structure of the intermediate new phase Li4FeSb2 is isotype to the face-centered-cubic Li3Sb phase in which one Fe atom is substituted by two Li atoms.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 189, Issue 1, 1 April 2009, Pages 324–330
نویسندگان
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