کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7740919 1497991 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Facile chemical synthesis of nitrogen-doped graphene sheets and their electrochemical capacitance
ترجمه فارسی عنوان
سنتز شیمیایی لایه ای از صفحات گرافن دوتایی نیتروژن و ظرفیت الکتروشیمیایی آنها
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی
To improve the electrochemical performance of graphene materials, nitrogen-doped graphene sheets (NGS) were simultaneously reduced and functionalized with nitrogen (N) doping from graphene oxide (GO) by a simple process using 1 wt.% ammonia water solution as the reducing agent, nitrogen precursor and solvent. The NGS were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy-energy dispersive spectroscopy microanalysis, and differential scanning calorimetry. The thermal stability of NGS was much higher than that of GO. The N content in NGS was 4.4 at.% and a maximum specific capacitance up to 233.3 F g−1 was obtained at 0.5 A g−1. At 0.02 V s−1, the NGS exhibited a specific capacitance of 140.3 F g−1, which was over 8 times that of GO and nearly 2 times that of graphene without N-doping. These results revealed that N-doping of functional graphene provide remarkable improvements on the electrochemical capacitive performance of graphene materials. The NGS also showed high cycle stability of capacitive performance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 241, 1 November 2013, Pages 460-466
نویسندگان
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