کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
186211 459609 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Chemical unzipping of multiwalled carbon nanotubes for high-capacity lithium storage
ترجمه فارسی عنوان
از بین بردن مواد شیمیایی نانولوله های کربنی چند لایه برای ذخیره سازی لیتیوم با ظرفیت بالا
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• MWCNTs were longitudinally split to be unzipped by a chemical oxidative etching.
• UCNTs were self-folded and entangled to interlace a nanoporous 3D network.
• UCNTs show high reversible Li+ storage, good rate capability and cycle stability.

Multiwalled carbon nanotubes (MWCNTs) were longitudinally split to be unzipped by a facile chemical oxidative etching. Transmission electron microscope images and Raman spectra confirmed that most of MWCNTs were opened and some were transformed to multi-layered graphene nanoribbons. Scanning electron microscope images showed that unzipped carbon nanotubes (UCNTs) were interwined each other to form a tridimensional porous film. The N2 adsorption/desorption analysis showed that the UCNTs had larger specific surface area and more mesopores compared to MWCNTs. The galvanostatic charge-discharge experiments showed that the reversible capacity of UCNTs were up to 765 mAh g−1 at 0.1 A g−1 and kept 635 mAh g−1 at various current densities. The reversible capacity remained stable around 420 and 330 mAh g−1 at current rates of 0.6 and 1 A g−1 with coulombic efficiency above 99% over 300 cycles.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 125, 10 April 2014, Pages 170–175
نویسندگان
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