کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7739077 | 1497985 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Lithium deficient mesoporous Li2âxMnSiO4 with significantly improved electrochemical performance
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Li2âxMnSiO4 compounds with mesoporous structure are first proposed in the present work. It is interesting to note that the lithium deficient compounds exhibit much higher electrochemical performance in comparison with the stoichiometric one. Among these compounds, Li1.8MnSiO4 shows the best electrochemical performance. It is found that mesoporous Li1.8MnSiO4 without carbon coating delivers a maximum discharge capacity of 110.9 mAh gâ1 at 15 mA gâ1, maintaining 90.8 mAh gâ1 after 25 cycles, while that of the stoichiometric one is only 48.0 mAh gâ1, with 12.5 mAh gâ1 remaining. The superior properties are mainly due to the great improvement of electronic conductivity and structure stability, as well as suppressed charge-transfer resistance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 247, 1 February 2014, Pages 497-502
Journal: Journal of Power Sources - Volume 247, 1 February 2014, Pages 497-502
نویسندگان
Haiyan Wang, Tianli Hou, Dan Sun, Xiaobing Huang, Hanna He, Yougen Tang, Younian Liu,