کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7990736 | 1516130 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High performance symmetric solid state supercapacitor based on electrode of RuxNi1-xCo2O4 grown on nickel foam
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
Symmetric solid state supercapacitors attract increasing attention. We report one kind of high performance symmetric solid state supercapacitor composed with RuxNi1-xCo2O4 electrode. Ruthenium (Ru) element is doped into nickel cobaltite (NiCo2O4), and the material is grown on conductive nickel foam directly to act as electrode. The synthesis involves two procedure: one hydrothermal procedure to fabricate metal oxide precursor, and another annealing procedure to transform precursor into RuxNi1-xCo2O4. Chemical composition, crystal structure, morphology and specific superficial area are characterized through various techniques. Doping of ruthenium improve the electrochemical performance of electrode in a large extent. RuxNi1-xCo2O4(xâ¯=â¯0.1) electrodes deliver lower electric resistance than NiCo2O4, superior specific capacitance (1526.8â¯Fâ¯g-1â¯at current density of 1â¯Aâ¯gâ1 in 2.0â¯M KOH) to NiCo2O4 (831.3â¯Fâ¯g-1â¯at 1â¯Aâ¯gâ1), and better stability (94.3% retention after 3000 cycles at 10Aâ¯gâ1) than NiCo2O4 (91.9% retention). We assemble symmetric solid state supercapacitors, which deliver an outstanding energy density (48.5â¯Whâ¯kgâ1 at a power density of 2000 Wâ¯kgâ1 and 8.44â¯Whâ¯kgâ1 at 15000â¯Wâ¯kgâ1). These superior merits suggest their wide potential application in industrial area.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 764, 5 October 2018, Pages 767-775
Journal: Journal of Alloys and Compounds - Volume 764, 5 October 2018, Pages 767-775
نویسندگان
Siyu Yang, Jing Yu, Tongtong Jiang, Lixin Zhu, Xiaoliang Xu,