کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1290115 | 973319 | 2010 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Elevated temperature cycling stability and electrochemical impedance of LiMn2O4 cathodes with nanoporous ZrO2 and TiO2 coatings
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this study, nanoporous zirconia (ZrO2) and titania (TiO2) coatings are shown to stabilize the cycling performance of lithium-ion batteries with LiMn2O4 spinel cathodes. The effect of firing temperature on the coating pore size is discussed and the resulting performance of the coated cathodes is evaluated. Stabilization mechanisms, such as neutralization of acidic electrolytes by ZrO2 and TiO2 coatings, are examined. It is proposed that the establishment of a complex nanoporous network for lithium-ion transport results in a more uniform current distribution at the particle surface, thereby suppressing capacity fade that may be associated with surface instabilities of the spinel electrode.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 195, Issue 15, 1 August 2010, Pages 4943–4951
Journal: Journal of Power Sources - Volume 195, Issue 15, 1 August 2010, Pages 4943–4951
نویسندگان
Kenneth A. Walz, Christopher S. Johnson, Jamie Genthe, Lucas C. Stoiber, Walter A. Zeltner, Marc A. Anderson, Michael M. Thackeray,