کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8961298 | 1646478 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
In situ fabrication of porous graphene electrodes for high-performance lithiumoxygen batteries
ترجمه فارسی عنوان
تولید انبوه الکترودهای گرافنی متخلخل برای باتری های لیتیوم اکسیژن با عملکرد بالا
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کلمات کلیدی
باتری باتری لیتیوم، گرافن متخلخل سنتز در محل، رسوبات بخار شیمیایی، ساختار کاتد
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
These years, LiO2 batteries attract wide interest because of its high theoretical energy density. However, the catalytic activity and porous structure of cathode remains a great challenge. In this work, we developed a hierarchical porous graphene foam to serve as a battery cathode, which has much richer active sites for cathodic reaction and channels for Li+ transfer and O2 diffusion. The cathode exhibits a superior specific capacity as high as 9559Â mAh gâ1 at 57Â mAÂ gâ1 and remains a high-rate capability of 3988Â mAh gâ1 at an increased current density of 285Â mAÂ gâ1. Benefiting from the well-designed cathode structure, the battery can be stably operated for 150 cycles with a stable voltage profile and voltage efficiency up to 65%. The well-designed graphene has a potential to be a superior free-standing cathode to other carbon-based materials due to its good combination of its hierarchical and porous structure, large surface area, abundant defects and excellent mechanical stability.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 43, Issue 33, 16 August 2018, Pages 16128-16135
Journal: International Journal of Hydrogen Energy - Volume 43, Issue 33, 16 August 2018, Pages 16128-16135
نویسندگان
Xin Ji, Xingbao Zhu, Xiqiang Huang, Yuanguo Wu, Weihua Wan, Tian Yang, Yingzhang Yan, Yu Wang, Zhe Lü,