کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1288743 973274 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Si thin platelets as high-capacity negative electrode for Li-ion batteries
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Si thin platelets as high-capacity negative electrode for Li-ion batteries
چکیده انگلیسی

Pure Si platelets and Ni or Cu layer-laminated Si platelets with difference thickness were prepared, and their charge/discharge properties were examined in 1 M LiClO4/EC + DEC (1:1 by volume) as alternative negative electrode materials to graphite for Li-ion batteries. The shape of thin platelets and lamination with Ni layer are significantly effective to improve the cycleability in Li–Si alloy system by relieving the stress during the alloying/de-alloying processes, reinforcing the mechanical strength and reducing the Li+ ion diffusion length. Moreover, the first irreversible capacity is minimized by reduction of the amount of Ketjen Black (KB) in the composite electrode because of electrolyte decomposition on the surface of KB. Consequently, the Si/Ni/Si-LP30 (30/30/30 nm) composite electrode with 5 wt% KB also exhibits over 700 mAh g−1 even after 50 cycles in 1 M LiPF6/EC + DEC (1:1).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 196, Issue 16, 15 August 2011, Pages 6637–6643
نویسندگان
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