کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5459908 | 1516192 | 2017 | 28 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ti-doped Fe1âxTixF3·0.33H2O/C nanocomposite as an ultrahigh rate capability cathode materials of lithium ion batteries
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Ti-doped Fe1âxTixF3·0.33H2O/C nanocomposite as an ultrahigh rate capability cathode materials of lithium ion batteries Ti-doped Fe1âxTixF3·0.33H2O/C nanocomposite as an ultrahigh rate capability cathode materials of lithium ion batteries](/preview/png/5459908.png)
چکیده انگلیسی
The conductivity problem of FeF3·0.33H2O is the main constraint on development and application of this next-generation cathode material for lithium/sodium ion batteries. It has been found in our previous theoretical calculation that Ti-doping can dramatically improve the conductivity FeF3·0.33H2O, and thus improving its electrochemical performance. Herein, Ti-doped Fe1âxTixF3·0.33H2O (x = 0, 0.06, 0.08, 0.10) compounds have been successfully synthesized via a liquid-phase method. Subsequently, a ball milling process with acetylene black (AB) has been used to form Fe1âxTixF3·0.33H2O/C (x = 0, 0.06, 0.08, 0.10) nanocomposite. The chemical composition and elemental distribution of the Ti-doped FeF3·0.33H2O samples were investigated by X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDXs). The results show that Ti can effectively dope into the samples, and replace partially Fe3+ ions in the FeF3·0.33H2O crystal. Especially the Fe0.92Ti0.08F3·0.33H2O/C nanocomposite achieves an initial capacity of 460.15 mAh gâ1 and retains a discharge capacity of 294.86 mAh gâ1 after 40 cycles in the voltage range of 1.5-4.5 V. Besides, the as-prepared material shows excellent rate capability, it can deliver a discharge capacity of 146.06 mAh gâ1 even at 2 C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 702, 25 April 2017, Pages 372-380
Journal: Journal of Alloys and Compounds - Volume 702, 25 April 2017, Pages 372-380
نویسندگان
Shuangying Wei, Xianyou Wang, Ruizhi Yu, Rui Zhang, Min Liu, Zhenhua Yang, Hai Hu,