کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7990541 1516129 2018 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A smart architecture of nickel-cobalt sulfide nanotubes assembled nanoclusters for high-performance pseudocapacitor
ترجمه فارسی عنوان
یک معماری هوشمند از نانولوله های سولفید نیکل کبالت، نانوکیلرهای مونتاژ شده را برای شبیه سازهای با عملکرد بالا
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
چکیده انگلیسی
To develop a high-performance capacitive material with both superior power density and energy density, it is very important to construct a nanomaterial with a well-controlled structure. In this work, we report the preparation of NiCo2S4 nanotubes-assembled nanoclusters with a combination of hydrothermal and ion exchange processes. By optimizing the ion-exchange temperature, the tubular morphology can be both achieved and optimized. By tuning the conditions of the synthesis process, the diameter of the primary 1D structure can be increased, which leads to a compact cluster with decreased surface area. In particular, the sample prepared at 180 °C (NCS2) shows the morphology of nanoclusters assembled nanotubes with a wall thickness of about 7 nm. Such an architecture shows excellent electrochemical performance as a pseudocapacitor. It shows an initial specific capacitance of 1005 F g−1 at the current density of 1 A g−1 and remains 896 F g−1 at a current density of 20 A g−1. Moreover, it displays a favorable capacitance retention of 79.34% after 5000 cycles at a current density of 10 A g−1. Furthermore, the NCS2//AC asymmetric supercapacitor exhibits excellent rate performance (retaining 81% of the initial capacity when the current density increases from 1 A g−1 to 20 A g−1) and a high energy density of 52 Wh kg−1 at a power density of 9288 W kg−1. This work lays the foundation for the design and optimization of NiCo2S4 based nanostructured materials for energy storage.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 765, 15 October 2018, Pages 505-511
نویسندگان
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