کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
186580 459617 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fe3O4/PPy composite nanospheres as anode for lithium-ion batteries with superior cycling performance
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Fe3O4/PPy composite nanospheres as anode for lithium-ion batteries with superior cycling performance
چکیده انگلیسی

Uniform Fe3O4/PPy composite nanospheres (FPCNs) with Fe3O4 nanoparticles embedded in PPy nanospheres (∼200 nm) were prepared by a hydrothermal process followed by an ultrasonication assisted polymerization. For the first time, FPCNs were used as anode for lithium ion batteries, demonstrating enhanced electrochemical performance with high reversible capacity (544 mA h g−1 after 300 cycles), remarkable capacity retention (98% of the initial capacity after 300 cycles), as well as good rate capability (332 mAh g−1 at 2000 mA g−1). The spherical PPy matrix in FPCNs possesses three functions: 1) buffering the structural variation of Fe3O4 nanoparticles during charging/discharging process; 2) preventing the aggregation of Fe3O4 nanoparticles; 3) avoiding the direct contact between Fe3O4 nanoparticles and the electrolyte. The results observed in this study may shed some light on the investigation of MOx/polymer composite electrode materials.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 121, 1 March 2014, Pages 428–433
نویسندگان
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