کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6601908 | 1424074 | 2018 | 35 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Coal tar pitch derived N-doped porous carbon nanosheets by the in-situ formed g-C3N4 as a template for supercapacitor electrodes
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
N-doped porous carbon nanosheets (N-CNS) were prepared from coal tar pitch with the addition of urea and KOH activation. In the synthesis route, urea plays an important role in constructing the 2D sheet-like structure, which serves as a nitrogen source, chemical blowing agent and the in-situ formation of g-C3N4 self-degraded template. At a low activation temperature (600â¯Â°C), the as-prepared N-doped porous carbon nanosheets possess high nitrogen content (7.06â¯at. %) and high specific surface area (1181â¯m2â¯gâ1), which offers remarkable capacitive performances due to the unique architecture and pseudocapacitance contribution of the N doping. The N-CNS exhibits high capacitive performance (210â¯Fâ¯gâ1 at 0.1â¯Aâ¯gâ1), and an excellent cycling stability. Additionally, the assembled symmetric supercapacitor displays an energy density of 7.15â¯Wh kgâ1, and the capacitance retention remains 91.2% after 5000 cycles at 1â¯Aâ¯gâ1. The facile and low-cost route to massively prepare N-doped porous carbon nanosheets from coal tar pitch would be favorable to the applications of carbon materials for high performance supercapacitors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 283, 1 September 2018, Pages 132-140
Journal: Electrochimica Acta - Volume 283, 1 September 2018, Pages 132-140
نویسندگان
Donghua Wang, Yanzhong Wang, You Chen, Wei Liu, Huiqi Wang, Peihua Zhao, Ying Li, Jinfang Zhang, Yingge Dong, Shengliang Hu, Jinlong Yang,