کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1284840 973094 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A hierarchical nanostructure consisting of amorphous MnO2, Mn3O4 nanocrystallites, and single-crystalline MnOOH nanowires for supercapacitors
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
A hierarchical nanostructure consisting of amorphous MnO2, Mn3O4 nanocrystallites, and single-crystalline MnOOH nanowires for supercapacitors
چکیده انگلیسی

In this communication, a porous hierarchical nanostructure consisting of amorphous MnO2 (a-MnO2), Mn3O4 nanocrystals, and single-crystalline MnOOH nanowires is designed for the supercapacitor application, which is prepared by a simple two-step electrochemical deposition process. Because of the gradual co-transformation of Mn3O4 nanocrystals and a-MnO2 nanorods into an amorphous manganese oxide, the cycle stability of a-MnO2 is obviously enhanced by adding Mn3O4. This unique ternary oxide nanocomposite with 100-cycle CV activation exhibits excellent capacitive performances, i.e., excellent reversibility, high specific capacitances (470 F g−1 in CaCl2), high power property, and outstanding cycle stability. The highly porous microstructures of this composite before and after the 10,000-cycle CV test are examined by means of scanning electron microscopy (SEM) and transmission electron microscopy (TEM).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 196, Issue 2, 15 January 2011, Pages 847–850
نویسندگان
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