کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7990398 | 1516127 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Composition, microstructure and performance of cobalt nickel phosphate as advanced battery-type capacitive material
ترجمه فارسی عنوان
ترکیب، ریزساختار و عملکرد فسفات نیکل کبالت به عنوان مواد پیشرفته باطری نوع خازنی
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کلمات کلیدی
فسفات نیکل کبالت، ترکیب و ریزساختار، عملکرد الکتروشیمیایی، مواد خازنی نوع باتری،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
چکیده انگلیسی
A series of cobalt nickel phosphates are prepared via a mild chemical precipitation method followed by calcination at a low temperature. With variation of Co/Ni molar ratio, the compositions and microstructures of the as-prepared samples are modulated and their electrochemical performances as battery-type materials are optimized. Electrochemical measurements by cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) technique and electrochemical impedance spectroscopy (EIS) reveal that the flower-like CoNi2(PO4)2 with the molar ratio of Co/Niâ¯=â¯1:2 exhibits a high specific capacity of 630.4â¯Câ¯gâ1 at the current density of 1â¯Aâ¯gâ1, and an excellent cycling stability of 84.3% capacity retention after 1000 cycles. Furthermore, a hybrid supercapacitor, fabricated with the CoNi2(PO4)2 as positive and graphene as negative electrode material, exhibits a high specific capacitance of 103â¯Fâ¯gâ1 at the current density of 1â¯Aâ¯gâ1, along with a high energy density of 32.2â¯Wh kgâ1 at the power density of 377.6â¯Wâ¯kgâ1, and even 21.7â¯Wh kgâ1 at 4.9â¯kWâ¯kgâ1. These figures demonstrate that cobalt nickel phosphates as electrode materials with the optimized composition and microstructure may hold promising application in energy storage devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 767, 30 October 2018, Pages 789-796
Journal: Journal of Alloys and Compounds - Volume 767, 30 October 2018, Pages 789-796
نویسندگان
Lingling Tao, Jun Li, Qingya Zhou, Huilin Zhu, Gang Hu, Jinping Huang,