کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7740373 | 1497992 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Decoration of graphene with silicon nanoparticles by covalent immobilization for use as anodes in high stability lithium ion batteries
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Decoration of graphene with silicon nanoparticles by covalent immobilization for use as anodes in high stability lithium ion batteries Decoration of graphene with silicon nanoparticles by covalent immobilization for use as anodes in high stability lithium ion batteries](/preview/png/7740373.png)
چکیده انگلیسی
Si nanoparticle-graphene hybrids are fabricated by covalent immobilization and subsequent heating in a H2 + Ar atmosphere. The absence of a graphite (002) peak in X-ray diffraction shows that the hybrid synthesized by this approach prevents graphene nanosheets re-agglomerating. Transmission electron microscopy shows a homogeneous distribution of Si nanoparticles on the graphene. Galvanostatic charge/discharge tests demonstrate that the Si nanoparticle-graphene hybrid has much better charge capacity retention than pristine Si nanoparticles and a Si nanoparticle/graphene mixture. The relationship of the capacity to the weight ratio of Si nanoparticles and graphene in the hybrid has been investigated. The results reveal that the hybrid of with a weight ratio 15:1 (Si:G) exhibits the most stable cycle performance, which retains 92.7% capacity of the 1st cycle after 50 charge/discharge cycles. The 1st Li+ insertion capacity is 1297 mAh gâ1, and the 50th Li+ insertion capacity is 1203 mAh gâ1.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 240, 15 October 2013, Pages 212-218
Journal: Journal of Power Sources - Volume 240, 15 October 2013, Pages 212-218
نویسندگان
Guangyu Zhao, Li Zhang, Yufeng Meng, Naiqing Zhang, Kening Sun,