کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7997781 | 1516221 | 2016 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Facile fabrication and electrochemical behaviors of Mn:ZnS nanocrystals
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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: Facile fabrication and electrochemical behaviors of Mn:ZnS nanocrystals Facile fabrication and electrochemical behaviors of Mn:ZnS nanocrystals](/preview/png/7997781.png)
چکیده انگلیسی
Here, we demonstrate the rational design and synthesis of Mn:ZnS nanocrystals with adjustable doping concentrations utilizing a facile, cost effective, and environmentally benign chemical protocol. These nanostructures were investigated as electrode materials for lithium-ion batteries. Compared with pristine ZnS nanocrystals, the Mn:ZnS nanocrystals exhibit significantly improved electrochemical performances in terms of specific capacity and cycling performance. The Mn:ZnS nanocrystal sample with doping concentration of 1 at% displays second discharge capacity of 789.9 mA h gâ1 at a current density of 24 mA gâ1, about 2.39 times higher than that of the pure ZnS nanocrystal. Furthermore, the Mn:ZnS nanocrystal electrodes represent much better capacity retention than that of the undoped one. The greatly improved electrochemical performances of the Mn:ZnS nanocrystal samples could be attributed to the following factors. The large specific surface area can significantly enhance structural integrity by acting as mechanical buffer, effectively alleviating the volume changes generated during the lithiation/delithiation process. The incorporation of Mn into the lattice of ZnS improves charge transfer kinetics and results in a faster Li+ diffusion rate during the charge-discharge process. It is of great significance to incorporate guest metal ions into nanostructured materials to display especial electrochemical characteristics triggering an effective approach to improve the electrochemical properties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 672, 5 July 2016, Pages 571-577
Journal: Journal of Alloys and Compounds - Volume 672, 5 July 2016, Pages 571-577
نویسندگان
Ruishi Xie, Yuanli Li, Haifeng Liu, Baogang Guo,