کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1293405 973545 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemical performance of a tin-coated carbon fibre electrode for rechargeable lithium-ion batteries
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Electrochemical performance of a tin-coated carbon fibre electrode for rechargeable lithium-ion batteries
چکیده انگلیسی

An Sn–carbon fibre composite electrode is fabricated by electrodepositing a thin film (0.5 ± 0.1 μm) of Sn with an ultrafine grain size (350 ± 50 nm) on the 7.5 ± 1.5 μm diameter fibres of a carbon fibre paper (CFP). The electrochemical performance of the Sn–CFP composite being considered as an anode material for rechargeable Li-ion batteries is evaluated by conducting galvanostatic charge–discharge cycling tests. The Sn–CFP electrode displays a reversible planar capacity of 2.96 mAh cm−2 with a capacity retention of 50% after twenty cycles, compared to the 23% measured for a 2.2 ± 0.2 μm thick Sn coating deposited on a Cu foil. The enhanced cycling performance of the Sn–CFP electrode is attributed to the double role played by carbon fibres, which act as randomly oriented current collectors in addition to being an active material. The small thickness and large surface area of the Sn coating on the carbon fibres enhances the coating's chemical reactivity and tolerance for volume change. It is suggested that transforming Sn to Sn oxides in Sn–CFP electrodes may improve the cycling performance of these composites as anode materials for rechargeable Li-ion batteries.


► Sn–carbon fibre composites as anode for Li-ion batteries.
► Microstructural evaluation to understand degradation mechanisms.
► Carbon fibres’ double role as microporous current collector and active material.
► Heat treatment could improve durability.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 196, Issue 18, 15 September 2011, Pages 7771–7778
نویسندگان
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