کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4767242 | 1424121 | 2017 | 35 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhancing the rate and cycling performance of spherical ZnO anode material for advanced zinc-nickel secondary batteries by combined in-situ doping and coating with carbon
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
High-performance ZnO microspheres doped and coated with carbon has been successfully fabricated by a facile three-step process using trisodium citrate as doping carbon source and glucose as coating carbon source. Compared with carbon free ZnO precursor, the resulting ZnO-N2@Cmicrospheresexhibitsuperiorrateperformanceandenhancedcyclingstability.(*) At a rate of 10C (5000 mA gâ1), the ZnO-N2@C exhibits specific discharge capacity and volumetric capacities of 283.4 mAh gâ1 and 858.7 mAh cmâ3, respectively, while the values for the carbon free ZnO precursor are only 140.2 mAh gâ1 and 423.4 mAh cmâ3. After cycling 200 times at 500 mA gâ1, the obtained ZnO-N2@C can maintain a satisfying capacity of 508.2 mAh gâ1, corresponding to a superior capacity retention (94.7%). In contrast, carbon free ZnO can only deliver the capacity of 109.4 mAh gâ1 and a capacity retention of 24.7% after 200 cycles. This outstanding improvement is attributed to the synergistic effect of the combined in-situ doping and coating carbon, including reduced charge-transfer resistance, enhanced electrochemical reversibility, and better anti-corrosion capabilities. As a result, it is believed that ZnO-N2@C should be an attractive and promising anode material for high power Zinc-Nickel batteries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 236, 10 May 2017, Pages 180-189
Journal: Electrochimica Acta - Volume 236, 10 May 2017, Pages 180-189
نویسندگان
Jing Li, Tonghui Zhao, Enbo Shangguan, Yao Li, Linqian Li, Dong Wang, Mingyu Wang, Zhaorong Chang, Quanmin Li,