کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5149782 | 1497891 | 2017 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High-performance nickel-cobalt-boron material for an asymmetric supercapacitor with an ultrahigh energy density
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Nickel-cobalt-borons are synthesized using a facile and cost-effective reduction method. The effects of Ni/Co molar ratios and crystallinity on its supercapacitive performance are systematically investigated. It was found that nickel-cobalt-borons with the Ni/Co ratio being 2:1 and amorphous structure manifest the optimum specific capacitance of 2226.96Â F/g at a current density of 1 A/g and still remain 1879.2Â F/g with a high discharge current density of 20 A/g. An asymmetric supercapacitor device (ASC) has been fabricated with nickel-cobalt-borons (Ni-Co-B) as the positive electrode and commercial activated carbon (CAC) as the negative electrode material. The Ni-Co-B//CAC delivers an ultrahigh energy density of 66.40Â Wh/kg at a power density of 788.91Â W/kg. This ASC remains 85.76% of its initial capacitance even after 5000 charge-discharge cycles. The results demonstrate that amorphous nickel-cobalt-boron material is a promising candidate for energy storage application.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 341, 15 February 2017, Pages 75-82
Journal: Journal of Power Sources - Volume 341, 15 February 2017, Pages 75-82
نویسندگان
Rongna Chen, Lei Liu, Junshuang Zhou, Li Hou, Faming Gao,