کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1292860 1497949 2015 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Porous carbon nanotubes decorated with nanosized cobalt ferrite as anode materials for high-performance lithium-ion batteries
ترجمه فارسی عنوان
نانولوله های کربنی متخلخل با فریت نانو ذرات کبالت تزئین شده به عنوان مواد آند برای باتری های لیتیوم یون با کارایی بالا
کلمات کلیدی
نانولوله های کربنی متخلخل، پلک های اکسیژن، اکسید فلزی سه گانه، اثر هم افزایی، باتری لیتیوم یون
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی


• Nano-sized CoFe2O4 particles are uniformly deposited on the surface of porous CNTs.
• The p-CNTs@CFO electrode shows outstanding high capacity and good cycle stability.
• The p-CNTs@CFO shows excellent high-rate capability of 694 mAh g−1 at 3 A g−1.
• The pore and rich functional groups on p-CNTs contribute the excellent performance.

Generally, the fast ion/electron transport and structural stability dominate the superiority in lithium-storage applications. In this work, porous carbon nanotubes decorated with nanosized CoFe2O4 particles (p-CNTs@CFO) have been rationally designed and synthesized by the assistance of supercritical carbon dioxide (scCO2). When tested as anode materials for lithium-ion batteries, the p-CNTs@CFO composite exhibits outstanding electrochemical behavior with high lithium-storage capacity (1077 mAh g−1 after 100 cycles) and rate capability (694 mAh g−1 at 3 A g−1). These outstanding electrochemical performances are attributed to the synergistic effect of porous p-CNTs and nanosized CFO. Compared to pristine CNTs, the p-CNTs with substantial pores in the tubes possess largely increased specific surface area and rich oxygen-containing functional groups. The porous structure can not only accommodate the volume change during lithiation/delithiation processes, but also provide bicontinuous electron/ion pathways and large electrode/electrolyte interface, which facilitate the ion diffusion kinetics, improving the rate performance. Moreover, the CFO particles are bonded strongly to the p-CNTs through metal-oxygen bridges, which facilitate the electron fast capture from p-CNTs to CFO, and thus resulting in a high reversible capacity and excellent rate performance. Overall, the porous p-CNTs provide an efficient way for ion diffusion and continuous electron transport as anode materials.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 283, 1 June 2015, Pages 289–299
نویسندگان
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