کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1616208 1516371 2012 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Core–shell VPO4/C anode materials for Li ion batteries: Computational investigation and sol–gel synthesis
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Core–shell VPO4/C anode materials for Li ion batteries: Computational investigation and sol–gel synthesis
چکیده انگلیسی

Pristine VPO4 is a ground-state magnetic semiconductor, disclosed by density functional theory computations; therefore, core–shell VPO4/C composites were proposed and prepared via a sol–gel route. X-ray diffraction confirms the phase of orthorhombic vanadium phosphate, and scanning electron microscopy and transmission electron microscopy show that VPO4 particles are coated with amorphous carbon film of ∼8 nm in thickness to form core–shell nanostructures. Galvanostatic charge/discharge and cyclic voltammetry tests demonstrate that both the initial and reversible lithium storage capacities of VPO4 were apparently enhanced due to the carbon coating. Core–shell structures can effectively improve the electrochemical performances of phosphate-based Li-ion battery materials.

Figure optionsDownload as PowerPoint slideHighlights
► Core–shell VPO4/C composites were explored as anode materials for Li ion batteries.
► Core–shell VPO4/carbon composites were prepared via a sol–gel route.
► Li storage capacity of VPO4 was apparently enhanced due to carbon coating.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 522, 5 May 2012, Pages 167–171
نویسندگان
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