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
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
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 548â¯Câ¯gâ1 at 1â¯Aâ¯gâ1 in 2â¯M KOH aqueous solution, excellent rate capability (83.7%, 77.6%, 71.7% and 66.2% capacity retention at 10, 20, 30 and 40â¯Aâ¯gâ1), and remarkable cycling stability (86% capacity retention at 7â¯Aâ¯gâ1 after 3000 cycles). Furthermore, a hybrid supercapacitor, constructed by NixCo1-xP as anode and active carbon as cathode, exhibits excellent specific capacitance (115.8â¯Fâ¯gâ1 at 1â¯Aâ¯gâ1), high gravimetric energy/power density (31.52â¯Wh kgâ1 at 700â¯Wâ¯kgâ1), 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
Journal: Electrochimica Acta - Volume 285, 20 September 2018, Pages 192-201
نویسندگان
Yingqiao Xu, Shujin Hou, Guang Yang, Xiaojun Wang, Ting Lu, Likun Pan,