کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1418704 986011 2006 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Expansion of mesocarbon microbeads
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
پیش نمایش صفحه اول مقاله
Expansion of mesocarbon microbeads
چکیده انگلیسی

Expanded mesocarbon microbeads (EMCMB) were prepared from graphitized mesocarbon microbeads by a chemical method. The expanded volume of EMCMB was significantly influenced by the reaction time, temperature, weight ratio of sulfuric acid and nitric acid, the maximum value of which was 4.1 ml/g. The morphology and structure characters of MCMB after chemical reaction and expansion were also investigated by SEM, BET and XRD measurements. The results show that the spherical, layered structure of MCMB could be verified convincingly by SEM micrographs of EMCMB, and the values of crystallite parameters of intercalated MCMB and EMCMB such as Lc and La decreased significantly compared with that of pristine MCMB, indicating that the stack height and stack width of carbon layers in a crystallite decreased after intercalation reaction and expansion. Meanwhile, EMCMB with appropriate porosity using as anode material for lithium-ion batteries exhibited an excellent high-rate discharge capacity and good cycle stability at the large current density.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbon - Volume 44, Issue 4, April 2006, Pages 730–733
نویسندگان
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