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
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 1253 mAh g−1 with good cycling stability as well as the notable rate capability (476 mAh g−1 at 4 A g−1), 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 (460 mAh g−1 at 0.2 A g−1) was realized by adding 20 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
نویسندگان
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