کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10268618 | 459675 | 2011 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrochemical activation behaviors studied with graphitic carbon electrodes of different interlayer distance
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
A comparative study is made on the electrochemical activation behaviors for graphitic carbon electrodes having different interlayer distance: a pristine graphite (MCMB, mesocarbon microbead, 0.34Â nm), an expanded graphite (e-MCMB, 0.41Â nm), and a silica-pillared one (s-MCMB, 1.24Â nm). The pristine MCMB does not show any electrochemical activation behavior. In the case of e- and s-MCMB, however, the electrochemical activation is indeed occurring but completed in the earlier period of the first charging with a substantial electrode swelling. Of the two, the electrochemical activation is easier for the s-MCMB electrode with a lower activation potential and less significant electrode expansion. Moreover, the s-MCMB electrode gives a better rate capability after the electrochemical activation. The impedance analysis based on the transmission-line model with pore size distribution (TLM-PSD) illustrates that the electrochemically activated s-MCMB has a more ion-accessible pore structure as compared with e-MCMB.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 56, Issue 27, 30 November 2011, Pages 9931-9936
Journal: Electrochimica Acta - Volume 56, Issue 27, 30 November 2011, Pages 9931-9936
نویسندگان
Hyun D. Yoo, Yuwon Park, Ji Heon Ryu, Seung M. Oh,