کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10267114 | 459441 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
In situ atomic force microscopy study of dimensional changes during Li+ ion intercalation/de-intercalation in highly oriented pyrolytic graphite
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: In situ atomic force microscopy study of dimensional changes during Li+ ion intercalation/de-intercalation in highly oriented pyrolytic graphite In situ atomic force microscopy study of dimensional changes during Li+ ion intercalation/de-intercalation in highly oriented pyrolytic graphite](/preview/png/10267114.png)
چکیده انگلیسی
The knowledge of dimensional changes during the electrochemical intercalation of Li+ ions in a secondary Li+ ion battery is of fundamental importance for a comprehensive understanding of the degradation mechanism of the negative electrode. In this work in situ electrochemical atomic force microscopy was used to measure the step height change during the intercalation/de-intercalation of Li+ into the graphene layers of highly oriented pyrolytic graphite (HOPG). During the first intercalation/de-intercalation cycle an irreversible increase of graphene layer spacing of about 24 ± 7% was evidenced. During consecutive repetitive scanning between 3 and 0.005 V vs. Li/Li+, a reversible change of the step height of the HOPG of about ±17% could be observed in 1 M LiClO4 in ethylene carbonate and dimethyl carbonate in a 1:1 (w/w) ratio. The statistical procedure to determine the height changes introduced in the present study is superior to the evaluation of single line scans.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochemistry Communications - Volume 7, Issue 1, January 2005, Pages 107-112
Journal: Electrochemistry Communications - Volume 7, Issue 1, January 2005, Pages 107-112
نویسندگان
F.P. Campana, R. Kötz, J. Vetter, P. Novák, H. Siegenthaler,