کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7991198 | 1516137 | 2018 | 25 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Yolk structure of porous C/SiO2/C composites as anode for lithium-ion batteries with quickly activated SiO2
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A yolk structure of C/SiO2/C and a hollow structure of C/SiO2 composites with porous feature are synthesized by one-step method and two steps method, respectively. When evaluate as an anode material for lithium-ion batteries (LIBs), the C/SiO2/C and C/SiO2 deliver an impressive cycle performance and exhibit an excellent rate capacity. More importantly, attributing to the one-step synthesis method of C/SiO2/C, it possesses interconnected micropore and higher special surface area, which provide a more efficient ionic transportation path and facilitate the diffusion of Li+ between the electrolyte and C/SiO2/C, thus the activation time of SiO2 can be effectively shorten. The capacity achieves the steady value of 1135â¯mAh gâ1 (based on the weight of SiO2 in the electrode material) only by 60 cycles at 50â¯mAâ¯gâ1 which is much faster than that of C/SiO2 and delivers a high-rate capacity of 390â¯mAh gâ1â¯at 1000â¯mAâ¯gâ1. Considering the good lithium storage abilities and fast-activated features, the C/SiO2/C composites hold promise in applications in practical LIBs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 757, 15 August 2018, Pages 265-272
Journal: Journal of Alloys and Compounds - Volume 757, 15 August 2018, Pages 265-272
نویسندگان
Zhiqiang Gu, Xiaohong Xia, Chan Liu, Xi Hu, Yuxi Chen, Zhiyong Wang, Hongbo Liu,