کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6581500 456337 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation of sandwich-like ternary hierarchical nanosheets manganese dioxide/polyaniline/reduced graphene oxide as electrode material for supercapacitor
ترجمه فارسی عنوان
آماده سازی نانوساختار سلسله مراتبی سه بعدی ساندویچ مانند دی اکسید منگنز / پلی آنیلین / کاهش اکسید گرافن به عنوان مواد الکترود برای ابررایانه
کلمات کلیدی
نانوسایل سلسله مراتبی سه گانه، کاهش اکسید گرافین، دی اکسید منگنز، پلی آنیلین، ابرخازنها،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی
In this paper, a new class of sandwich-like ternary hierarchical nanosheets is fabricated by a facile, reproducible, and scalable two-step strategy. Conducting polymer polyaniline (PANI) is coated on reduced graphene oxide (RGO) to form PANI/RGO hybrid nanosheets. Then, nanoflaky manganese dioxide (MnO2) in situ grows on PANI/RGO hybrid nanosheets to obtain ternary hierarchical nanosheets MnO2/PANI/RGO by simply mixing PANI/RGO and KMnO4 under mild condition. The electrochemical behavior shows that MnO2/PANI/RGO electrode material is a typical pseudo-capacitance. In comparison with RGO, PANI, and PANI/RGO hybrid nanosheets, MnO2/PANI/RGO composites display the highest specific capacitance of 1090.2 F g−1 at 0.5 A g−1 in three-electrode configuration. They maintain 82.3% initial capacitance after 5000 consecutive cycles at 0.5 A g−1. The excellent electrochemical performance is attributed to nanometer-sized flaky MnO2in situ growth on the surface of PANI/RGO, which can enhance electrode/electrolyte interface areas, provide high electroactive regions and short diffusion lengths, and protect the structure of composites effectively. Thus, the sandwich-like ternary hierarchical nanosheets of MnO2/PANI/RGO are excellent electrode material in supercapacitor with high specific capacitance and the long-term cycle stability, which is helpful in developing new kinds of portable energy storage devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 304, 15 November 2016, Pages 29-38
نویسندگان
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