کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7954220 | 1513769 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A one-step hard-templating method for the preparation of a hierarchical microporous-mesoporous carbon for lithium-sulfur batteries
ترجمه فارسی عنوان
یک روش سخت افزاری یک مرحله ای برای تهیه یک کربن مینرپورس سلول سلولی برای باتری های لیتیوم گوگرد
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
شیمی مواد
چکیده انگلیسی
Porous carbon materials can increase the conductivity of sulfur and restrain the shuttling of polysulfides in the electrolyte. A hierarchical microporous-mesoporous carbon (HMMC) with a large surface area and pore volume was prepared by the simple one-step carbonization of a mixture of magnesium gluconate (MG) and phenolic resin. The MG was transformed into nanosize magnesium oxide that acted as a hard template during carbonization to create mesopores. The HMMC has a high surface area (â¼1 560 m2 gâ1) and large pore volume (â¼2.6 cm3 gâ1), which provides abundant space for sulfur loading and accommodates volume changes during charge/discharge. The interconnected pore structure and carbon framework ensure fast electron and Li ion transfer. As the cathode of a Li-S battery the sulfur-loaded HMMC has a high discharge capacity of 939 mAh gâ1 at 0.3 C and a reversible capacity of 731 mAh gâ1 after 150 cycles with only a 0.15% capacity fade per cycle. Even at a high rate of 2 C, it still delivers a high discharge capacity of 626 mAh gâ1, showing an excellent rate performance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: New Carbon Materials - Volume 32, Issue 4, August 2017, Pages 289-296
Journal: New Carbon Materials - Volume 32, Issue 4, August 2017, Pages 289-296
نویسندگان
Shu-zhang Niu, Si-da Wu, Wei Lu, Quan-hong Yang, Fei-yu Kang,