کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5458512 | 1516164 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Copper incorporated in Li3V2(PO4)3/C cathode materials and its effects on high-rate Li-ion batteries
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Copper incorporated in Li3V2(PO4)3/C cathode materials for high-rate Li-ion batteries were prepared by a self-catalysed sol-gel approach followed by a sintering process. The effect of copper incorporating amounts on the crystal structure, morphology and related electrochemical properties of Li3V2(PO4)3/C was investigated. It is noteworthy that the impurity Li3PO4 phase can be effectively affected by copper-incorporating without any significant influence on the surface morphology and crystal structure; moreover, the carbon layer coated onto Li3V2(PO4)3-Cu0.05/C can be separated into the porous inner layer and the graphene-type outer layer. Benefiting from above two factors, copper-incorporated Li3V2(PO4)3/C composite with improved electrochemical properties has been achieved. In comparison with pure Li3V2(PO4)3/C, the Li3V2(PO4)3-Cu0.05/C composite delivers a reversible specific capacity of 123.3 mAh gâ1 after 50 cycles at a current rate of 1C and 116.2 mAh gâ1 at 10C, maintaining 98.2% and 89.5% of capacity retention, respectively, and even cycled at 20C rate, it still possesses 105.4 mAh gâ1 of discharge capacity, demonstrating an excellent rate capability and cycling stability.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 730, 5 January 2018, Pages 103-109
Journal: Journal of Alloys and Compounds - Volume 730, 5 January 2018, Pages 103-109
نویسندگان
Ji Yan, Hua Fang, Xiaodong Jia, Lizhen Wang,