کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5458027 | 1516163 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Facile synthesis of N and S co-doped graphene sheets as anode materials for high-performance lithium-ion batteries
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A simple and cost-effective approach is proposed to synthesize the nitrogen (N) and sulfur (S) co-doped graphene sheets. X-ray photoelectron spectroscopy reveals that the content of N and S atoms is 5.42% and 0.52%, respectively, indicating that N and S have been successfully incorporated into the graphene sheets. The resulting co-doped graphene sheets exhibit excellent electrochemical performance when they are employed as anode materials for lithium-ion batteries. A superhigh initial reversible capacity of 1016Â mAh gâ1 at a current density of 100Â mAÂ gâ1 was obtained. More significantly, even at an extremely high current density of 20Â AÂ gâ1, the as-prepared co-doped graphene still delivers a high capacity of about 250.1Â mAh gâ1. The improved electrochemical performance is due to the two-dimensional structure, the large quantity of edge defects, and the synergistic effect of N and S atoms. The results indicate that the co-doped graphene sheets could be promising candidate for high-performance lithium-ion batteries materials.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 731, 15 January 2018, Pages 235-242
Journal: Journal of Alloys and Compounds - Volume 731, 15 January 2018, Pages 235-242
نویسندگان
Dandan Cai, Changshui Wang, Caiyan Shi, Ni Tan,