کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6581020 | 1422943 | 2018 | 42 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Mesoporous graphitic carbon-TiO2 composite microspheres produced by a pilot-scale spray-drying process as an efficient sulfur host material for Li-S batteries
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Mesoporous graphitic carbon-TiO2 composite microspheres are fabricated by a facile process and used as an effective sulfur host material for Li-sulfur batteries (LSBs). Composite microspheres are several microns in size and with uniform size distributions that contained maltodextrin, iron nitrate, and TiO2 nanocrystals are formed using a pilot-scale spray-drying process, then transform into graphitic carbon-TiO2 composite microspheres with numerous empty nanovoids by a single post-treatment step and subsequent etching of metallic iron. The composite carbon microspheres not only have high pore volumes after the removal of metallic iron, providing sufficient spaces for the infiltration of sulfur, but also increase electronic conductivity in electrodes due to the graphitic carbon. Consequently, a high specific capacity of 516â¯mAâ¯hâ¯gâ1 at a current density of 5â¯C and a reversible capacity of 599â¯mAâ¯hâ¯gâ1 after 600 cycles at a current density of 1â¯C are achieved, indicating the excellent capability of the material for use in energy storage devices. The structure of the mesoporous graphitic carbon-TiO2 composite microspheres make them suitable for use as a host material in sulfur cathodes and can significantly improve the electrochemical performances of LSBs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 335, 1 March 2018, Pages 600-611
Journal: Chemical Engineering Journal - Volume 335, 1 March 2018, Pages 600-611
نویسندگان
Gi Dae Park, Jeongyeon Lee, Yuanzhe Piao, Yun Chan Kang,