کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1331766 979015 2006 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
V2O5 xerogel–poly(ethylene oxide) hybrid material: Synthesis, characterization, and electrochemical properties
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
V2O5 xerogel–poly(ethylene oxide) hybrid material: Synthesis, characterization, and electrochemical properties
چکیده انگلیسی

In this work, we report the synthesis, characterization, and electrochemical properties of vanadium pentoxide xerogel–poly(ethylene oxide) (PEO) hybrid materials obtained by varying the average molecular weight of the organic component as well as the components’ ratios. The materials were characterized by X-ray diffraction, ultraviolet/visible and infrared spectroscopies, thermogravimetric analysis, scanning electron microscopy, electron paramagnetic resonance, and cyclic voltammetry. Despite the presence of broad and low intensity peaks, the X-ray diffractograms indicate that the lamellar structure of the vanadium pentoxide xerogel is preserved, with increase in the interplanar spacing, giving evidence of a low-crystalline structure. We found that the electrochemical behaviour of the hybrid materials is quite similar to that found for the V2O5 xerogel alone, and we verified that PEO leads to stabilization and reproducibility of the Li+ electrochemical insertion/de-insertion into the V2O5 xerogel structure, which makes these materials potential components of lithium ion batteries.

The synthesis, structural and electrochemical properties of vanadium pentoxide xerogel–poly(ethylene oxide) hybrid materials have been described. Despite the presence of broad and low intensity peaks, the X-ray diffractograms indicate that the lamellar structure of the vanadium pentoxide xerogel is preserved. The cyclic voltammetry technique demonstrated that PEO intercalation provides an improvement in the electrochemical properties, mainly with respect to the lithium electroinsertion process into the oxide matrix.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 179, Issue 12, December 2006, Pages 3814–3823
نویسندگان
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