کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6601733 | 1424071 | 2018 | 40 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis of hollow ZnCo2O4 microspheres with enhanced electrochemical performance for asymmetric supercapacitor
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Synthesis of hollow ZnCo2O4 microspheres with enhanced electrochemical performance for asymmetric supercapacitor Synthesis of hollow ZnCo2O4 microspheres with enhanced electrochemical performance for asymmetric supercapacitor](/preview/png/6601733.png)
چکیده انگلیسی
To construct high energy density asymmetric supercapacitors, a new class of electrodes with high ion transport performance and high electrical conductivity is needed. The hollow ternary metal oxides are considered as promising materials for supercapacitors. Herein, hollow ZnCo2O4 microspheres are successfully obtained using a solvothermal and coordinating etching route. Particularly, the transformation process from core-shell ZnCo2O4/ZnO structure to pure hollow ZnCo2O4 structure is explored in detail for the first time. The hollow ZnCo2O4 microspheres have a uniform morphology of 1-2â¯Î¼m and a high surface area of 24.7â¯m2â¯gâ1. The ZnCo2O4 exhibits a high specific capacitance of 78.89â¯mAhâ
gâ1 at current density of 1 Aâ¯gâ1 with a high loading of 6â¯mgâ¯cmâ2 and superior cycling stability after 2000 cycles. Furthermore, the ZnCo2O4//activated carbon asymmetric supercapacitor device achieves a high specific capacitance of 34.7â¯mAhâ
gâ1 at 0.2 Aâ¯gâ1 and an energy density of 27.78â¯Whâ
kgâ1 at a power density of 158.5â¯Wâ¯kgâ1. Moreover, three asymmetric devices in series can efficiently power 3â¯mm diameter red and green LED indicators for more than 30 and 15â¯min, respectively. These excellent capacitive performances indicate the as-fabricated hollow structures ZnCo2O4 is a promising electrode material for supercapacitors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 286, 1 October 2018, Pages 103-113
Journal: Electrochimica Acta - Volume 286, 1 October 2018, Pages 103-113
نویسندگان
Yuanyuan Shang, Tian Xie, Chuanli Ma, Linghao Su, Yansong Gai, Jing Liu, Liangyu Gong,