کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7740861 | 1497993 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Self-assembled porous NiCo2O4 hetero-structure array for electrochemical capacitor
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
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چکیده انگلیسی
Porous NiCo2O4 hetero-structure arrays on nickel foam are prepared by a facile hydrothermal method. The morphology of the arrays changes with the growth time. After hydrothermal synthesis for 8Â h in combination with annealing treatment, the NiCo2O4 array presents a nanoflake-nanowire hetero-structure. The porous NiCo2O4 hetero-structure array exhibits the excellent pseudocapacitive properties in 2Â M KOH, with a high capacitance of 891Â FÂ gâ1 at 1Â AÂ gâ1 and 619Â FÂ gâ1 at 40Â AÂ gâ1 before activation as well as excellent cycling stability. The specific capacitance can achieve a maximum of 1089Â FÂ gâ1 at a current density of 2Â AÂ gâ1, which can still retain 1058Â FÂ gâ1 (97.2% retention) after 8000 cycles. The enhanced pseudocapacitive performances are mainly attributed to its unique hetero-structure which provides fast ion and electron transfer, large reaction surface area and good strain accommodation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 239, 1 October 2013, Pages 157-163
Journal: Journal of Power Sources - Volume 239, 1 October 2013, Pages 157-163
نویسندگان
X.Y. Liu, Y.Q. Zhang, X.H. Xia, S.J. Shi, Y. Lu, X.L. Wang, C.D. Gu, J.P. Tu,