کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4767760 | 1424141 | 2016 | 34 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dandelion-like NiCo2O4 hollow microspheres as enhanced cathode catalyst for Li-oxygen batteries in ambient air
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
The high overpotentials of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in the air cathode are still big challenge to be overcome for the high performance non-aqueous lithium-air batteries (LABs), especially in ambient air. In this paper, dandelion-like NiCo2O4 hollow microspheres are prepared through a simple self-assembled hydrothermal process as cathode catalyst. The assembled LABs show relative high discharge potential in different oxygen partial pressure, and can deliver a reversible capacity of 8019 mAh·gâ1 at the current density of 300 mA·gâ1 with stable cycle performance for at least 40 times in ambient air. The excellent performance of NiCo2O4 cathode can be attributed to the dandelion hollow structure, together with the abundant oxygen vacancies, which would enhance the ORR and OER process. The study confirms the feasibility of dandelion-like NiCo2O4 hollow spheres as efficient cathode for the LABs in ambient air.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 216, 20 October 2016, Pages 120-129
Journal: Electrochimica Acta - Volume 216, 20 October 2016, Pages 120-129
نویسندگان
Lu Zou, Yuexing Jiang, Junfang Cheng, Yingpeng Gong, Bo Chi, Jian Pu, Li Jian,