کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10141437 | 1646070 | 2019 | 33 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Lithium ion supercapacitor composed by Si-based anode and hierarchal porous carbon cathode with super long cycle life
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A lithium ion supercapacitor full cell is fabricated with a Fluorine-doped carbon encapsulated SiOx as anode and a Nitrogen-doped carbon with hierarchical meso-micro porous structure as cathode. Benefited from the fast kinetic lithium reaction as well as longevity in the newly synthesized Si-base anode and high capacitance on the porous carbon, the hybrid device delivering of high power density, high energy density and super long cycle life is demonstrated. After prelithiation of Si-base anode, this hybrid supercapacitor exhibits a high capacity of 120â¯mAhâ¯gâ1 at 0.2â¯Aâ¯gâ1 after 1600 cycles. A capacity of 42â¯mAhâ¯gâ1 can still be obtained even under the current density of 3â¯Aâ¯gâ1. Furthermore, Super long cycle life (45â¯mAhâ¯gâ1 capacity with 1â¯Aâ¯gâ1 after 10,000 cycles), low leakage current (3.8â¯Î¼A) and low self-discharge (82% voltage retention after 48â¯h resting in open-circuit potential) are revealed. This work presents not only a simple route for the synthesis of Si-base anode for energy storage devices on lithium chemistry, but also a new approach to the construction of hybrid battery-capacitor device.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 463, 1 January 2019, Pages 879-888
Journal: Applied Surface Science - Volume 463, 1 January 2019, Pages 879-888
نویسندگان
Deyu Qu, Xinhua You, Xiaoke Feng, Jorryn Wu, Dan Liu, Dong Zheng, Zhi-zhong Xie, Deyang Qu, Junsheng Li, Haolin Tang,