کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7712387 | 1497422 | 2016 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ternary graphene/sulfur/SiO2 composite as stable cathode for high performance lithium/sulfur battery
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Ternary graphene/sulfur/SiO2 composite as stable cathode for high performance lithium/sulfur battery Ternary graphene/sulfur/SiO2 composite as stable cathode for high performance lithium/sulfur battery](/preview/png/7712387.png)
چکیده انگلیسی
Ternary graphene/sulfur/SiO2 (graphene/S/SiO2) composite has been successfully synthesized by compositing sulfur with graphene and then wrapping with SiO2. The graphene/S/SiO2 composite exhibits superior specific capacity and improved cycling stability owing to the combined contributions from both graphene and SiO2 when used as cathode materials for lithium/sulfur batteries. The graphene/S/SiO2 demonstrates a specific capacity of 696 mAh gâ1 after activated, which is considerably higher than the graphene/S and pure sulfur samples. In addition, the graphene/S/SiO2 and graphene/S composites demonstrate improved cycling stability and much higher coulombic efficiency than the pure sulfur sample owing to the successful prevention of polysulfides diffusion. Furthermore, both graphene/S/SiO2 and graphene/S composites show an activation step in first 30 cycles, which can be attributed to the gradually increased capacity from reduction of high-order polysulfides to low-order polysulfides.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 41, Issue 3, 21 January 2016, Pages 1819-1827
Journal: International Journal of Hydrogen Energy - Volume 41, Issue 3, 21 January 2016, Pages 1819-1827
نویسندگان
Pan Wei, Meiqiang Fan, Haichao Chen, Da Chen, Chao Li, Kangying Shu, Chunju Lv,