کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6612753 | 459590 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Li-Ion Storage Performance of MnO Nanoparticles Coated with Nitrogen-Doped Carbon Derived from Different Carbon Sources
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
Manganese (II) oxide (MnO) nanoparticles with nitrogen-doped (N-doped) carbon coating were fabricated via an efficient carbonization process using pyrrole, acrylonitrile and pyridine as different carbon sources, respectively. High-resolution transmission electron microscopy (HR-TEM) characterizations reveal the uniform carbon coating on the MnO nanoparticles. X-ray photoelectron spectroscopy (XPS) measurements demonstrate the presence of pyridinic N and pyrrolic N in the carbon coating. The nanocomposite using pyridine as carbon source exhibited superior cycling and rate performance, which could deliver a reversible capacity of 634Â mAh gâ1 after 100 cycles at a current density of 100Â mA gâ1 and the capacities of 591, 510, 440, 310 mAh gâ1 at 100, 200, 400 and 800Â mA gâ1, respectively. From the comparison of the electrochemical performances of the MnO and N-doped carbon nanocoposites derived from different carbon sources, pyridinic N contributes more to the improvement of cycling performance and rate capability than pyrrolic N.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 146, 10 November 2014, Pages 249-256
Journal: Electrochimica Acta - Volume 146, 10 November 2014, Pages 249-256
نویسندگان
Guixia Lu, Song Qiu, Hailong Lv, Ya Fu, Jiurong Liu, Xiaoyu Li, Yu-Jun Bai,