کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5147465 1497382 2016 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nitrogen doped superporous carbon prepared by a mild method. Enhancement of supercapacitor performance
ترجمه فارسی عنوان
کربن سنگین کربن نیتروژن تولید شده توسط روش خفیف. افزایش عملکرد ابررسانای
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی
Nitrogen functionalization (ca. 4 at. % NXPS) of a highly microporous activated carbon (SBET > 3000 m2/g) has been achieved by two different approaches at mild conditions: (i) oxidation and post-reaction with nitrogen reactants, and (ii) direct reaction of pristine carbon material with nitrogen reactants. Interestingly, the introduction of nitrogen functionalities allows full preservation of the microporosity when pathway (ii) is followed. The electrochemical performance of the carbon materials as electrodes for supercapacitors was evaluated by using symmetric and asymmetric configuration in 1 M H2SO4. Both nitrogen-functionalized carbon materials showed larger stability and energy efficiency than the pristine carbon material when working at 1.4 V. The non-oxidized and functionalized activated carbon evidences the best performance as electrode for supercapacitor, providing energy and power density of 14.5 Wh/kg and 61.2 kW/kg and keeping 83% of original capacitance after 5000 charge-discharge cycles. This improvement is related to the presence of surface nitrogen functionalities that provide a higher electrochemical stability, avoiding the formation of detrimental oxygen groups during the operation of the supercapacitor.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 41, Issue 43, 16 November 2016, Pages 19691-19701
نویسندگان
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