کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7709260 | 1497329 | 2017 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Design and synthesis of Ni-Co and Ni-Mn layered double hydroxides hollow microspheres for supercapacitor
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Design and synthesis of Ni-Co and Ni-Mn layered double hydroxides hollow microspheres for supercapacitor Design and synthesis of Ni-Co and Ni-Mn layered double hydroxides hollow microspheres for supercapacitor](/preview/png/7709260.png)
چکیده انگلیسی
The development of electrode materials with hierarchically porous structure and high electrochemical stability is crucial for the electric energy density of supercapacitors. Hollow microspheres of Ni-Co layered double hydroxides (LDHs) and Ni-Mn LDHs are fabricated with a simple co-precipitation method at low temperature using SiO2 microspheres as a sacrifice template. The as-fabricated two LDH hollow microspheres possess a unique 3D architecture and exhibit high specific capacitance, as well as excellent rate and cycling performances as electrode materials of supercapacitors. A specific capacitance of 1766.4â¯Fâ¯gâ1 at 1â¯Aâ¯gâ1 is achieved for Ni-Co LDHs electrode, much higher than that of Ni-Mn LDHs. A hybrid capacitor composed of Ni-Co LDHs hollow spheres and activated carbon is fabricated and evaluated for practical application, providing an energy density of 44.3â¯Whâ¯kgâ1 at a power density of 0.425â¯kWâ¯kgâ1. This study indicates that the hollow LDH microsphere prepared by our method is a promising material for supercapacitors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 48, 30 November 2017, Pages 28797-28806
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 48, 30 November 2017, Pages 28797-28806
نویسندگان
M. Li, PengWei Yuan, SongHao Guo, F. Liu, J.P. Cheng,