کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7724854 | 1497838 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Highly conductive carbon nanotube micro-spherical network for high-rate silicon anode
ترجمه فارسی عنوان
شبکه کروی نانولوله کربنی بسیار رسانا برای آند نیکل سیلیکون با سرعت بالا
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
We report on a highly conductive CNT micro-spherical network for high-rate silicon anode materials prepared by one-pot spray drying for lithium-ion batteries. The anode material contains silicon nanoparticles bound to CNTs through a small amount of sucrose-derived carbon. The first charge and discharge capacities of the Si/CNT/C microsphere electrode are measured to be 3152 and 2302â¯mAâ¯hâ¯gâ1 of the composite, respectively, at 0.1â¯Aâ¯gâ1. The Si/CNT/C microsphere electrode exhibits an initial capacity of 1989â¯mAâ¯hâ¯gâ1â¯at current density of 1.0â¯Aâ¯gâ1 and retains â¼70% of the initial capacity after 100 cycles. Even at a high current density of 10â¯Aâ¯gâ1, the Si/CNT/C microsphere electrode exhibits a capacity of 784â¯mAâ¯hâ¯gâ1 with a stable charge/discharge behavior. The superior rate capability of the Si/CNT/C microsphere composites can be attributable to the unhindered Li-ion transport through the highly conductive CNT buffer matrix, to which Si NPs are strongly bound by the sucrose-derived carbon. These salient results give further impetus to the study of CNTs for use as a buffer matrix to improve the rate capability of high-capacity electrode materials with large volume changes during charge storage.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 394, 1 August 2018, Pages 94-101
Journal: Journal of Power Sources - Volume 394, 1 August 2018, Pages 94-101
نویسندگان
Byung Hoon Park, Jun Hui Jeong, Geon-Woo Lee, Young-Hwan Kim, Kwang Chul Roh, Kwang-Bum Kim,