کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5149466 | 1497889 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Double-shelled tremella-like NiO@Co3O4@MnO2 as a high-performance cathode material for alkaline supercapacitors
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
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چکیده انگلیسی
Tremella-like NiO@Co3O4@MnO2 particles of core-double-shelled structure were synthesized by a three-step hydrothermal route and thermal treatment. The hierarchical layered porous structure of the particles has a BET surface area of 179.2Â m2Â gâ1. Galvanostatic cycling in 6.0Â M KOH aqueous solution produced capacitance over an ideal cathode potential cycling range. At a high current density of 2Â AÂ gâ1, NiO@Co3O4@MnO2 has a high specific capacitance of 792.5Â FÂ gâ1 with > 90% capacity retention over 1000 cycles, and a high rate capability of 68.9% of its initial capacitance was also maintained over a 0.2-4Â AÂ gâ1 current density increase. We conclude that NiO@Co3O4@MnO2 offers a promising high rate, high specific capacitance cathode material for alkaline supercapacitors, which owes both to its porous architecture and its synergistic mixed oxide core-shell-shell composition.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 343, 1 March 2017, Pages 76-82
Journal: Journal of Power Sources - Volume 343, 1 March 2017, Pages 76-82
نویسندگان
Hui Wang, Qian Ren, Dan J.L. Brett, Guanjie He, Rongfang Wang, Julian Key, Shan Ji,