کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5488758 | 1399583 | 2017 | 22 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhanced cycle stability of silicon nanoparticles coated with nitrogen-doped carbon layer for lithium-ion battery anode
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We prepared single-crystal Si nanoparticles (Si NPs) â¼50Â nm in diameter using a laser photopyrolysis technique and formed a nitrogen-doped carbon layer on them using pyrrole and FeCl3 to increase the cycle stability of the Si anodes during volume expansion and contraction. The surface chemical bonding states of the nitrogen-doped carbon-coated Si NPs were investigated. The specific capacity and capacity retention of the sample with 1Â g of FeCl3 were the highest at approximately 967.1Â mAh gâ1 and 87.3% after 300 cycles at 1Â C, respectively. The diffusion coefficient of Li ions after 1000 test cycles was 9.64Â ÃÂ 10â8Â cm2Â s-1. The higher cycling stability of the Si@NC NPs could be attributed to the nitrogen-doped carbon layers, which provided an efficient transport pathway for the electrons.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Current Applied Physics - Volume 17, Issue 8, August 2017, Pages 1087-1093
Journal: Current Applied Physics - Volume 17, Issue 8, August 2017, Pages 1087-1093
نویسندگان
Hun Seok Choi, Su Jae Kim, Hyun Woo Choi, Cheul-Eon Park, Ying Jun Gao, Yang Hang, Se-Young Jeong, Jong-Pil Kim, Jong-Seong Bae, Chae-Ryong Cho,