کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7994161 | 1516155 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Double-shelled Co3O4@TiO2@C yolk-shell spheres as anode material for enhanced cycling stability of lithium ion batteries
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Double-shelled Co3O4@TiO2@C yolk-shell spheres as anode material for enhanced cycling stability of lithium ion batteries Double-shelled Co3O4@TiO2@C yolk-shell spheres as anode material for enhanced cycling stability of lithium ion batteries](/preview/png/7994161.png)
چکیده انگلیسی
In this paper, double-shelled Co3O4@TiO2@C yolk-shell spheres have been successfully synthesized for enhanced the cycling stability of lithium ion batteries (LIBs). The inter-layer SiO2 as a sacrificial layer is removed by LiOH ethylene glycol/water solution at hydrothermal treatment, while the Co3O4 spheres are grown into the Co3O4 flowers due to the Ostwald ripening process. The morphologies, element contents, structure, element distribution and compositions of the samples are characterized by SEM, TEM, EDS, XRD and XPS. When evaluated as anode material, the double-shelled TiO2@C layer and void space can not only prevent the aggregation of Co3O4 and electrode polarization, but also improve the charge transfer and lithium ions diffusion. Remarkably, the double-shelled Co3O4@TiO2@C yolk-shell spheres can still deliver stable and reversible capacities of approximately 400â¯mAh gâ1 at the current density of 200â¯mAâ¯gâ1 during 100 cycles, far higher than those of Co3O4 spheres (about 100â¯mAh gâ1). Cyclic voltammetry curves also show that the Co3O4@TiO2@C yolk-shell spheres possess superior reversible reactions for lithium ions insertion-extraction. As such, our work demonstrates a rational way to improve the electrochemical performance of metal oxides for LIBs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 739, 30 March 2018, Pages 746-754
Journal: Journal of Alloys and Compounds - Volume 739, 30 March 2018, Pages 746-754
نویسندگان
Wenming Liao, Jianhua Tian, Zhongqiang Shan, Hongzhen Lin, Ren Na,