کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7901939 | 1510439 | 2014 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Lithium vanado-phosphate glasses: Structure and dynamics properties studied by molecular dynamics simulations
ترجمه فارسی عنوان
لیتیم وانادو فسفات لیپوس: خواص ساختاری و دینامیک بررسی شده توسط شبیه سازی دینامیک مولکولی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
Lithium vanado-phosphate glasses have been designated as possible cathode material for the next generation of solid state batteries, due to their high conductivity and mixed electronic-ionic conducting behaviours, which derive from the small polaron hopping between the vanadium ions with different valence state and the lithium ion diffusion. Therefore, the understanding of the behaviour of these glasses at the atomistic level can be an important aspect in designing compositions for these applications. To reach this goal, the structure and lithium ion diffusion behaviour in lithium vanado-phosphate glasses with mixed V4Â + and V5Â + ions were studied using molecular dynamics simulations. The results show that vanadium oxide generally plays an intermediate role in glass structure while there are subtle details depending on its concentration and oxidation states. The phosphorus network is depolymerized by the content of vanadium oxide, but phosphorus ions always contribute to the glass network, interposing to vanadium polyhedra. The V4Â +OV5Â + linkages, responsible for the polaron hopping mechanism, show a linear dependence to the V2O5/P2O5 ratio, which highlights a strong role of the interaction between the former ions. The lithium ion diffusion was studied by mean square displacement calculations and it was found that the self-diffusion coefficient just depends on the Li content.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 403, 1 November 2014, Pages 53-61
Journal: Journal of Non-Crystalline Solids - Volume 403, 1 November 2014, Pages 53-61
نویسندگان
Giulia Broglia, Consuelo Mugoni, Jincheng Du, Cristina Siligardi, Monia Montorsi,