کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6601806 1424072 2018 32 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of bimetallic NixCo1-xP hollow nanocages from metal-organic frameworks for high performance hybrid supercapacitors
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Synthesis of bimetallic NixCo1-xP hollow nanocages from metal-organic frameworks for high performance hybrid supercapacitors
چکیده انگلیسی
Hollow nanostructures are favorable for electrode materials to enhance their energy storage performance due to their unique structural features. In this work, hollow bimetallic phosphide (NixCo1-xP) was fabricated via etching treatment of ZIF-67 and further phosphorization. The as-obtained NixCo1-xP composites display a high specific capacity of 548 C g−1 at 1 A g−1 in 2 M KOH aqueous solution, excellent rate capability (83.7%, 77.6%, 71.7% and 66.2% capacity retention at 10, 20, 30 and 40 A g−1), and remarkable cycling stability (86% capacity retention at 7 A g−1 after 3000 cycles). Furthermore, a hybrid supercapacitor, constructed by NixCo1-xP as anode and active carbon as cathode, exhibits excellent specific capacitance (115.8 F g−1 at 1 A g−1), high gravimetric energy/power density (31.52 Wh kg−1 at 700 W kg−1), and outstanding long-term cycling stability (98.3% capacitance retention even after 10000 cycles). The excellent electrochemical performance should be attributed to the good interfacial contact between electrode and electrolyte, unique hollow structure with suitable surface area and good electrical conductivity of NixCo1-xP. The results suggest a great potential of NixCo1-xP composites in electrochemical energy storage devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 285, 20 September 2018, Pages 192-201
نویسندگان
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