کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6602514 | 1424077 | 2018 | 33 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Crossed carbon skeleton enhances the electrochemical performance of porous silicon nanowires for lithium ion battery anode
ترجمه فارسی عنوان
اسکلت کربنی عبور می کند عملکرد الکتروشیمیایی نانوسیم های سیلیکونی متخلخل را برای آندای باتری یون لیتیوم افزایش می دهد
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کلمات کلیدی
نانوسیمهای سیلیکون متخلخل، اسکلت کربنی عبور کرد آنود، باتری های لیتیوم یون، افزودنی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
As a most promising anode candidate, silicon has the shortcomings of low electron conductivity and high volume expansion of 300%, hindering its applications in lithium ion batteries (LIBs). In this study, one-dimension porous silicon nanowires (pSi-NWs) were prepared through a simple metal-assisted chemical etching process by using metallurgical silicon as raw material. To consolidate the structural integrity of pSi-NWs, a crossed carbon skeleton (c-Cs) was introduced into pSi-NWs via in-situ polymerization and carbonization process. The resultant pSi-NWs@c-Cs composite delivered the high capacity of 1253â¯mAh gâ1 with good cycling stability as well as the notable rate capability (476â¯mAh gâ1 at 4â¯Aâ¯gâ1), much superior to those of pSi-NWs and pSi-NWs@reduced graphene oxide composite. The enhanced electrochemical performance of pSi-NWs@c-Cs composite is attributed to the crossed carbon skeleton in constructing the advanced Si/C interface to more effectively improve the electron conductivity of pSi-NWs and acting as the protective shell to keep the structure integrity of pSi-NWs. As the additive of commercial graphite anode, 28% of capacity augment (460â¯mAh gâ1 at 0.2â¯Aâ¯gâ1) was realized by adding 20â¯wt% of pSi-NWs@c-Cs composite into graphite, demonstrating its promising applications in LIBs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 280, 1 August 2018, Pages 86-93
Journal: Electrochimica Acta - Volume 280, 1 August 2018, Pages 86-93
نویسندگان
Fangfang Zhang, Liu Wan, Jiangtao Chen, Xiaocheng Li, Xingbin Yan,