کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7852069 | 1508866 | 2015 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Carbons with narrow pore size distribution prepared by simultaneous carbonization and self-activation of tobacco stems and their application to supercapacitors
ترجمه فارسی عنوان
کربن با توزیع اندازه ی منحنی باریکه تهیه شده توسط کربنیزاسیون همزمان و خود فعال سازی ساقه های توتون و تهیه آنها به ابررایانه ها
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی (عمومی)
چکیده انگلیسی
Highly microporous carbons with narrow pore size distribution have been prepared by simultaneous carbonization and self-activation of tobacco wastes at temperatures ranging from 600 to 1000 °C. The efficiency of porosity development, without pores broadening, is attributed to well-distributed alkalis at the molecular level in the tobacco precursor. With Burley tobacco, the BET specific surface area and average micropore size L0 increased up to 800 °C (Burley 800), where the values reached maxima of 1749 m2 gâ1 and 1.2 nm, respectively. At temperatures higher than 800 °C, annealing of the materials dominates and provokes a decrease of SBET and L0. Burley carbons were implemented in supercapacitors using 1 mol Lâ1 aqueous Li2SO4 or 1 mol Lâ1 TEABF4 in acetonitrile. In both electrolytes, the capacitance of Burley carbons followed the same trend as SBET and L0. Burley 800 demonstrated outstanding capacitance values of 167 F gâ1 (at 0.8 V limit) and 141 F gâ1 (at 2.3 V limit) in 1 mol Lâ1 aqueous Li2SO4 and 1 mol Lâ1 TEABF4, respectively. Such values, about 50% higher as compared to commercially available carbons, are attributed to the narrow pore size distribution of this carbon with a maximum of pores around 1.2 nm close to the size of solvated ions in these electrolytes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbon - Volume 81, January 2015, Pages 148-157
Journal: Carbon - Volume 81, January 2015, Pages 148-157
نویسندگان
P. Kleszyk, P. Ratajczak, P. Skowron, J. Jagiello, Q. Abbas, E. FrÄ
ckowiak, F. Béguin,