کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
195012 459804 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhanced cycling stability of LiMn2O4 by surface modification with melting impregnation method
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Enhanced cycling stability of LiMn2O4 by surface modification with melting impregnation method
چکیده انگلیسی

The surface of as-prepared LiMn2O4 was modified with Al2O3 by a melting impregnation method. X-ray diffraction, field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) studies indicated that Al2O3 nano-particles are distributed around the spinel. X ray absorption fine structure analysis (XAFS) further demonstrated that Al atoms were also doped to the surface of LiMn2O4 particles. The nano-Al2O3 particle coating improves the capacity retention of spinel LiMn2O4 efficiently at both room temperature and 55 °C. The mechanism of improvement for surface modified LiMn2O4 can be attributed to the inhibition of a surface Jahn-Teller distortion and the decrease of manganese dissolution, leading to good electric contact among particles.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 51, Issue 28, 15 September 2006, Pages 6456–6462
نویسندگان
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