کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7731081 | 1497938 | 2015 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High power TiO2 and high capacity Sn-doped TiO2 nanomaterial anodes for lithium-ion batteries
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A range of phase-pure anatase TiO2 (â¼5 nm) and Sn-doped TiO2 nanoparticles with the formula Ti1-xSnxO2 (where x = 0, 0.06, 0.11 and 0.15) were synthesized using a continuous hydrothermal flow synthesis (CHFS) reactor. Charge/discharge cycling tests were carried out in two different potential ranges of 3 to 1 V and also a wider range of 3 to 0.05 V vs Li/Li+. In the narrower potential range, the undoped TiO2 nanoparticles display superior electrochemical performance to all the Sn-doped titania crystallites. In the wider potential range, the Sn-doped samples perform better than undoped TiO2. The sample with composition Ti0.85Sn0.15O2, shows a capacity of ca. 350 mAh gâ1 at an applied constant current of 100 mA gâ1 and a capacity of 192.3 mAh gâ1 at a current rate of 1500 mA gâ1. After 500 charge/discharge cycles (at a high constant current rate of 382 mA gâ1), the same nanomaterial anode retains a relatively high specific capacity of 240 mAh gâ1. The performance of these nanomaterials is notable, particularly as they are processed into electrodes, directly from the CHFS process (after drying) without any post-synthesis heat-treatment, and they are made without any conductive surface coating.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 294, 30 October 2015, Pages 94-102
Journal: Journal of Power Sources - Volume 294, 30 October 2015, Pages 94-102
نویسندگان
Mechthild Lübke, Ian Johnson, Neel M. Makwana, Dan Brett, Paul Shearing, Zhaolin Liu, Jawwad A. Darr,