کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5347583 | 1503549 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Laser in-situ synthesis of SnO2/N-doped graphene nanocomposite with enhanced lithium storage properties based on both alloying and insertion reactions
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This paper reported a SnO2/N-doped graphene nanocomposite (SnO2/N-Gr) electrode which was prepared by a laser in-situ synthesis method. When demonstrated as anodes for lithium storage, the SnO2/N-Gr electrode showed improved lithium storage capacities and rate performance. In details, a reversible capacity of 830 mAh gâ1 was obtained after 300 cycles at a current density of 300 mA gâ1, and when the current density increased up to 3 A gâ1, the SnO2/N-Gr electrode revealed a high reversible capacity of 600 mAh gâ1. It was proven that the excellent electrochemical performance mainly related to a hybrid lithium storage mechanism which combined with alloying and insertion reactions. By introducing huge numbers of micropores and defects on graphene sheets, N-doping increased the number of hosts for lithium insertion and enhanced the Li+ diffusion rate in graphene sheets, so both of lithium storage capacities and rate performance were effectively improved. The SnO2/N-Gr electrode had a short preparing procedure and good electrochemical performance, which hold potential for development of next generation lithium ion batteries with high specific capacities and good rate performance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 422, 15 November 2017, Pages 645-653
Journal: Applied Surface Science - Volume 422, 15 November 2017, Pages 645-653
نویسندگان
Xiaoxiao Lu, Guolong Wu, Qinqin Xiong, Haiying Qin, Zhenguo Ji, Hongge Pan,