کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4766732 1424107 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mesoporous Co@N-rich carbon hybrids for a high rate aqueous alkaline battery
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Mesoporous Co@N-rich carbon hybrids for a high rate aqueous alkaline battery
چکیده انگلیسی
Metal cobalt has infinite potential for super performance aqueous alkaline batteries. But it is a high degree of requirements to design and synthesize composites to solve the common problems than Co materials. Hence towards that end, Co@N-rich carbon hybrids (CoNC) have been designed and prepared via an in-situ, facile and effective method. By doping abundant nitrogen (about 5 wt%), the mesoporous carbon shells provide more active sites, enhanced electrical conductivity and electrode infiltration, and avoid the Co nanoparticles agglomeration and serious electrode dissolution. When used as the electrode for the aqueous alkaline battery, the CoNC hybrids deliver outstandingly higher discharge capacity, superior high-rate ability, and stable cycling ability. A high discharge capacity of 625 mAh g−1 has been delivered at 500 mA g−1 and reduced to 455.7 mAh g−1 after 150 cycles for the CoNC electrode. Even the current increases up to 5 A g−1, the capacity still remains at 461.3 mAh g−1, manifesting the fascinating high-rate discharge ability. Importing the rich nitrogen species makes a significant difference to give full play a positive role on the aqueous alkaline battery, which as well guides a new direction towards high-rate power batteries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 250, 1 October 2017, Pages 135-142
نویسندگان
, , , , , , ,