کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7734690 1497957 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Self-assembled three-dimensional mesoporous ZnFe2O4-graphene composites for lithium ion batteries with significantly enhanced rate capability and cycling stability
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Self-assembled three-dimensional mesoporous ZnFe2O4-graphene composites for lithium ion batteries with significantly enhanced rate capability and cycling stability
چکیده انگلیسی
We report a facile, one-pot hydrothermal strategy to prepare self-assembled three-dimensional mesoporous ZnFe2O4 submicron-sized spheres wrapped in graphene sheets as high-performance anode material for lithium ion batteries. The mesoporous submicron-sized spheres are composed of numerous nanoparticles where the void spaces between the neighboring nanoparticles provide a cushion to alleviate volume variation issues during the conversion/alloying process and also provide large contact areas with the electrolyte to facilitate lithium ion diffusion and electron transport during cycling. The synergistic effects between ZnFe2O4 submicron-sized spheres and graphene sheets are another positive effect to enhance the electrochemical performance. The electrochemical characterization of ZnFe2O4-graphene composites exhibits a high specific capacity of 1182 mAh g−1 cycling at a specific current of 100 mA g−1, and significantly enhanced rate capability and cycling stability after long-term testing resulting from their unique structure features.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 275, 1 February 2015, Pages 769-776
نویسندگان
, , , , ,