کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7951851 | 1513698 | 2018 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis of porous carbon spheres derived from lignin through a facile method for high performance supercapacitors
ترجمه فارسی عنوان
سنتز کربن های کربن متخلخل مشتق شده از لیگنین از طریق یک روش فشرده برای ابررایانه های با کارایی بالا
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
شیمی مواد
چکیده انگلیسی
Porous carbon spheres (PCS) derived from lignin have been prepared through a facile method and fabricated as electrodes for electric double-layer capacitors. Spherical shaped mixtures of lignosulfonate and crystalized KOH are formed by spray drying of a solution of lignosulfonate and KOH. Activation by KOH is performed at high temperatures along with lignosulfonate carbonization. With an appropriate pore structure, the obtained PCS have a specific surface area of 1372.87 m2 gâ1 and show a capacitance of 340 F gâ1 in 3 M KOH at a current density of 0.5 A gâ1. Moreover, a symmetric supercapacitor fabricated using the PCS as electrodes show a maximum capacitance of 68.5 F gâ1, and an energy density of 9.7 W h kgâ1 at a power density of 250 W kgâ1. The capacity retention is more than 94.5% after 5000 galvanostatic charge-discharge cycles. The excellent characteristics seem to be ascribed to the pore structures of PCS that have a large specific surface area and a low electrical resistance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Science & Technology - Volume 34, Issue 11, November 2018, Pages 2189-2196
Journal: Journal of Materials Science & Technology - Volume 34, Issue 11, November 2018, Pages 2189-2196
نویسندگان
Yuemei Chen, Guoxiong Zhang, Jingyuan Zhang, Haibo Guo, Xin Feng, Yigang Chen,