کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6601945 | 1424073 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Waste soybean dreg-derived N/O co-doped hierarchical porous carbon for high performance supercapacitor
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Soybean dreg is a byproduct of soybean oil extraction, also called “soybean meal”. Here, we demonstrate that a N/O co-doped hierarchical porous carbon can be derived from soybean dreg through a facile KOH activation and high-temperature carbonization for high performance electrode material of supercapacitor in both aqueous (6.0â¯M KOH) and ionic liquid (EMIMBF4) electrolytes. The material carbonize at 800â¯Â°C possesses a high ion-accessible surface (1837.26â¯m2â¯gâ1) induced by the interconnected 3D network and a high level of micropores (0.71â¯cm3â¯gâ1), which are beneficial for large-scale ion storage and high-speed ion transport. Furthermore, high contents of nitrogen (1.58 at.%) and oxygen (11.41 at.%) can induce the contribution of faradaic pseudocapacitance for electric double-layer capacitor (EDLCs). As a result, the N/O co-doped hierarchical porous carbon derived from waste soybean dregs displays a superior specific capacity of 321.1â¯Fâ¯gâ1 at the current density of 1â¯Aâ¯gâ1, high rate capability of 249.7â¯Fâ¯gâ1 at 30â¯Aâ¯gâ1 and excellent cycling durability of 99.5% at 1â¯Aâ¯gâ1 after 10â¯000 cycles in three electrode system using 6â¯M KOH electrolyte. Notably, an excellent energy density can reach as high as 22.1â¯Wh kgâ1 at the power density of 875.0â¯Wâ¯kgâ1 in two-electrode system using EMIMBF4 electrolyte. This green, renewable and eco-friendly biomass porous carbon might be widely used in the fields of energy conversion device for now and in the foreseeable future.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 284, 10 September 2018, Pages 336-345
Journal: Electrochimica Acta - Volume 284, 10 September 2018, Pages 336-345
نویسندگان
Yibei Zhou, Juan Ren, Li Xia, Qiaoji Zheng, Jie Liao, Enyan Long, Fengyu Xie, Chegngang Xu, Dunmin Lin,