کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5355325 1503578 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Highly uniform Co9S8 nanoparticles grown on graphene nanosheets as advanced anode materials for improved Li-storage performance
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Highly uniform Co9S8 nanoparticles grown on graphene nanosheets as advanced anode materials for improved Li-storage performance
چکیده انگلیسی
A Co9S8/GNS (graphene nanosheets) nanocomposites has been synthesized via a facile solvothermal approach followed by thermal treatment in nitrogen at 500 °C using graphite oxide sheets, CoCl2·6H2O and thiourea as the starting materials. Highly uniform Co9S8 nanoparticles with a size of about 80-90 nm are evenly grafted on the surface of GNS, forming a unique Co9S8/GNS hybrid nanostructure. When evaluated as anode materials for lithium ion batteries, impressive electrochemical performances of the as-prepared nanocomposites are achieved compared to that of pure bulk Co9S8, with an high reversible capacity of 1480 mAh g−1. Moreover, the as-synthesized nanocomposites present excellent cycling durability and high-rate capability. The improvement in the electrochemical properties could be attributed to the well-designed structure of the Co9S8/GNS nanocomposite which possesses large number of accessible active sites for lithium-ion insertion, fast ion diffusion rate and good electronic conductivity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 390, 30 December 2016, Pages 86-91
نویسندگان
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