کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7832980 | 1503514 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Tunable pore structure for confining polysulfides in high performance Li-S battery with coal precursor
ترجمه فارسی عنوان
ساختار منافذ قابل تنظیم برای محدود کردن پلی سولفید ها در باتری لیتیوم با عملکرد بالا با پیش ماده ذغال سنگ
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
چکیده انگلیسی
The lithium-sulfur (Li-S) battery is a promising technology for next generation energy storage systems due to low cost materials and high theoretical energy capacity. However, the well-known 'shuttle effect' of polysulfides, that has significant impact on battery performance, has impeded the commercialization of Li-S batteries with high volumetric energy density and cycle life necessary for economic viability. Herein, we provide a facile method for the fabrication of hierarchical porous carbon with optimal pore structure to support sulfur in the cathode. The specific surface area of the coal-derived hierarchical porous carbon can be as high as 3343â¯m2/g, with a high distribution of pores between 2 and 5â¯nm, which is both beneficial to confining the polysulfides and increased sulfur loading (as high as 76â¯wt%). With most of sulfur confined in small mesopores, the carbon/sulfur composites show a high specific capacity of 1390 mAh/g at 0.05 C with â¼85% capacity retention after 100 cycles at 0.5 C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 458, 15 November 2018, Pages 714-721
Journal: Applied Surface Science - Volume 458, 15 November 2018, Pages 714-721
نویسندگان
Danmiao Kang, Kun Tang, John P. Lemmon,