کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8001563 | 1516283 | 2014 | 19 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation and electrochemical properties of binary SixSb immiscible alloy for lithium ion batteries
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The novel binary SixSb immiscible alloy was synthesized using chemical reduction-mechanical alloying methods and first investigated as possible anodes for lithium ion batteries. The microstructures, morphologies and electrochemical properties were investigated utilizing X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), constant-current charge/discharge tests, cyclic voltammetry and electrochemical impedance spectroscopy (EIS). Results showed that tiny Si particles were dispersed homogeneously in Sb active matrix. Cyclic voltammetry results indicated that the Li+-transport rates were significantly enhanced in the SixSb immiscible alloy. Results also showed that the Si0.8Sb exhibited the best cyclability with a reversible capacity of 596.4 mAh gâ1 after 50 cycles. The cyclability can be improved by restricting either the upper or lower cutoff voltage, which can control the lithiation/delithiation degree and prevented the powdering and shredding of the active materials after Li+ trapped into electrode materials.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 610, 15 October 2014, Pages 308-314
Journal: Journal of Alloys and Compounds - Volume 610, 15 October 2014, Pages 308-314
نویسندگان
Jingwei Wang, Yang Wang, Peixin Zhang, Dongyun Zhang, Xiangzhong Ren,