کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7992100 | 1516145 | 2018 | 24 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Porous hollow spherical Mg0.6Ni0.4O/S composite as cathode material for Li-S batteries
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
Porous hollow Mg0.6Ni0.4O has been fabricated by simple solvothermal method and removed the template by calcining. Afterward, taking advantage of liquid infiltration method, we have successfully synthesized hollow Mg0.6Ni0.4O/S as positive material for Li-S battery with a sulfur loading of 59.9â¯wt%. Porous hollow structure not only promoted the electron transfer, but also mitigated the expansion of element sulfur in the process of charging and discharging. Under a current density of 200â¯mAâ¯gâ1, the reversible capacity was up to 912â¯mAh gâ1 after 65 cycles with a high rate performance, coulombic efficiency and a capacity retention of 98%. Especially, at a higher current density of 4000â¯mAâ¯gâ1, the reversible capacity maintained at 174.5â¯mAh gâ1 after 500 cycles. The excellent electrochemical performance was owe to Mg0.6Ni0.4O alleviating polysulfide dissolution in electrolyte and had unique catalytic effect on the Li/S redox reactions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 749, 15 June 2018, Pages 594-598
Journal: Journal of Alloys and Compounds - Volume 749, 15 June 2018, Pages 594-598
نویسندگان
Lixin Zhang, Shaomei Zhang, Hongfang Jiu, Na Ren, Liya Jiang, Qi Wang, Xiaomin Wang,