کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5150238 | 1497902 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Magnesium substitution to improve the electrochemical performance of layered Li2MnO3 positive-electrode material
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Magnesium substitution to improve the electrochemical performance of layered Li2MnO3 positive-electrode material Magnesium substitution to improve the electrochemical performance of layered Li2MnO3 positive-electrode material](/preview/png/5150238.png)
چکیده انگلیسی
Li2MnO3 has received lots of attention due to its large theoretical capacity. However, its application is obstructed by low practical capacity and poor cycling stability. Here, a new tactic of magnesium substitution for partial lithium to improve the electrochemical performance of Li2MnO3 by a traditional solid state reaction is presented. Sample with only 1% magnesium content delivers a large initial discharge capacity of 307.5Â mAh gâ1 which is much superior than the 241.9Â mAh gâ1 of pristine Li2MnO3. The cycling performance also get improved that the capacity retention is 84.5% for Li1.98Mg0.01MnO3 but only 77.7% for pristine counterpart after 30 cycles at 0.1Â C. Moreover, the effective suppression of voltage decay has been achieved because of improved kinetic properties and leads to a tremendous progress in the energy density which is as much as 944Â Wh kgâ1 for Li1.98Mg0.01MnO3 compared with 747.1Â Wh kgâ1 of Li2MnO3. These achievements attained by Mg-doping make Li2MnO3 a promising positive-electrode material for the next generation of lithium ion batteries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 330, 31 October 2016, Pages 37-44
Journal: Journal of Power Sources - Volume 330, 31 October 2016, Pages 37-44
نویسندگان
Wei Zhao, Lilong Xiong, Youlong Xu, Xiang Xiao, Jisheng Wang, Zaihuang Ren,