کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5438036 | 1398180 | 2017 | 22 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
New insight into the modification of Li-rich cathode material by stannum treatment
ترجمه فارسی عنوان
بینش جدید به تغییر مواد کاتد غلیظ لیتیوم توسط درمان استنوم
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
In this work, Sn is used to dope the Li-rich cathode material to improve the electrochemical performance of Li ion battery. After Sn treatment, the lattice parameters a, c and lattice volume V become larger. Compared with the pristine sample, the Sn-contained samples show longer plateaux at about 4.5Â V in the first charging process, which means that Sn can activate the Li2MnO3 component. Meanwhile, with appropriate content of Sn doping, the sample exhibits enhanced rate capability and cycling stability. Especially, the sample S10 shows the best electrochemical performance, with a capacity retention of 88.66% after 100 cycles at 1Â C (1Â C=250Â mAÂ gâ1). The mechanisms of Sn doping have also been investigated. The increased activation of Li2MnO3 is due to the improved conductivity of Li2MnO3 phase by Sn doping, and the enhanced electrochemical performance is mainly ascribed to the increased ability of Li ion diffusing into bulk phase and the improved structure stability during the prolonged charge-discharge cycles. It is suggested that Sn doping is an effective way to improve the electrochemical performance of Li-rich cathode material.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 14, 1 October 2017, Pages 10919-10926
Journal: Ceramics International - Volume 43, Issue 14, 1 October 2017, Pages 10919-10926
نویسندگان
Hao Chen, Qiyang Hu, Wenjie Peng, Huajun Guo, Guochun Yan, Xianwen Wu,