کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7998956 | 1516254 | 2015 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of lithium and fluorine doping on the electrochemical and thermal stability of LiNi0.5Mn1.5O4 spinel cathode material
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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: Effect of lithium and fluorine doping on the electrochemical and thermal stability of LiNi0.5Mn1.5O4 spinel cathode material Effect of lithium and fluorine doping on the electrochemical and thermal stability of LiNi0.5Mn1.5O4 spinel cathode material](/preview/png/7998956.png)
چکیده انگلیسی
A series of lithium and fluorine substituted Li1+xNi0.5Mn1.5O4âxFx (0 ⩽ x ⩽ 0.4) spinel powders have been synthesized by a solid-state method. The effects of LiF content on structural, electrochemical and thermal properties are extensively investigated. The XRD patterns show that impurity arises when x ⩾ 0.3. FTIR results indicate that the cation disordering degree increases with an increasing in content of the co-doping with Li and F. The LiF concentration is optimized in the range of 0.06 ⩽ x ⩽ 0.2 in which the cyclic stability and rate capability of the Li1+xNi0.5Mn1.5O4âxFx spinels are significantly improved. Moreover, TEM images reveal that co-doped (Li+ and Fâ) particles form a smooth and uniform surface film, which mitigate the interaction of active materials and electrolyte solution as well as improve cycling stability. Besides, the thermal property of the co-doped (Li+ and Fâ) LiNi0.5Mn1.5O4 can effectively suppress the exothermic reaction according to the DSC results, which improve the thermal stability of the spinel material.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 639, 5 August 2015, Pages 346-351
Journal: Journal of Alloys and Compounds - Volume 639, 5 August 2015, Pages 346-351
نویسندگان
Haiyan Li, Ying Luo, Jingying Xie, Quansheng Zhang, Liqin Yan,