کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7731397 | 1497941 | 2015 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
FeS/C composite as high-performance anode material for alkaline nickel-iron rechargeable batteries
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
FeS and its composite, FeS/C, are synthesized via a simple calcination method followed by a co-precipitation process. The electrochemical properties of the bare FeS and FeS/C composite as anode materials for alkaline nickel-iron batteries are investigated. The results show that the FeS/C-3wt%Bi2O3-mixed electrode delivers a high specific capacity of 325 mAh gâ1 at a current density of 300 mA gâ1 with a faradaic efficiency of 90.3% and retains 99.2% of the initial capacity after 200 cycles. For the first time, it is demonstrated that even at a discharge rate as high as 1500 mA gâ1 (5C) the FeS/C-3wt%Bi2O3-mixed electrode delivers a specific capacity of nearly 230 mAh gâ1. SEM results confirm that after 200 discharge-charge cycles, the size of FeS/C particles reduces from 5 to 15 μm to less than 300 nm in diameter and the particles are highly dispersed on the surface of carbon black, which is likely caused by the dissolution-deposition process of Fe(OH)2 and Fe via intermediate iron species. As a result, the FeS/C composite exhibits considerably high charge efficiency, high discharge capacities, excellent rate capability and superior cycling stability. We believe that this composite is a potential candidate of high-performance anode materials for alkaline iron-based rechargeable batteries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 291, 30 September 2015, Pages 29-39
Journal: Journal of Power Sources - Volume 291, 30 September 2015, Pages 29-39
نویسندگان
Enbo Shangguan, Fei Li, Jing Li, Zhaorong Chang, Quanmin Li, Xiao-Zi Yuan, Haijiang Wang,