NiCo2O4@V2O5纳米带作为高效电化学电荷存储的电极材料

IF 2.5 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
D. K. Mohapatra, M. Sahoo, S. Praharaj, D. Rout
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引用次数: 0

摘要

新型纳米复合材料作为电极材料的发展是当前的研究热点。在这方面,我们尝试合成NiCo2O4@V2O5纳米复合材料,并将其与原始NiCo2O4纳米颗粒的电荷存储性能进行比较。高分辨率扫描电子显微镜显微照片显示,纳米复合材料具有介孔纳米带状形貌,brunauer - emmet - teller表面积为~ 65 m2 g−1,平均介孔尺寸为~ 7.55 nm。在两种样品上进行的电化学测量预测了准可逆氧化还原反应的电容行为。然而,研究发现NiCo2O4@V2O5在1ag - 1条件下的比容量高达194mah g - 1,即使在3000次充放电循环后,容量保持率仍高达90%,在5ag - 1条件下库仑效率高达97%。这些特性远远优于原始NiCo2O4纳米颗粒的性能。研究结果确定了NiCo2O4@V2O5纳米复合材料作为超级电容器电极材料的功能稳健性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
NiCo2O4@V2O5 nanobelts as electrode materials for efficient electrochemical charge storage
The development of novel nanostructured composites is of current interest for applications as electrode materials. In this regard, an attempt has been made to synthesize NiCo2O4@V2O5 nanocomposite and compare its charge storage performance with pristine NiCo2O4 nanoparticles. High-resolution scanning electron microscope micrographs reveal a mesoporous nanobelt like morphology of the nanocomposite with a Brunauer–Emmett–Teller surface area of ∼65 m2 g−1 and average mesopore size centered on ∼7.55 nm. Electrochemical measurements performed on both samples anticipate capacitive behavior with quasi-reversible redox reactions. However, NiCo2O4@V2O5 is found to demonstrate a strikingly high specific capacity of 194 mAh g−1 at 1 A g−1 along with a notable capacity retention of ∼90%, even after 3000 charge–discharge cycles, and a Coulombic efficiency >97% at 5 A g−1. These features are much superior to the properties of pristine NiCo2O4 nanoparticles. The results obtained in this work ascertain the functional robustness of NiCo2O4@V2O5 nanocomposites as electrode materials in supercapacitors.
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来源期刊
Nano Futures
Nano Futures Chemistry-General Chemistry
CiteScore
4.30
自引率
0.00%
发文量
35
期刊介绍: Nano Futures mission is to reflect the diverse and multidisciplinary field of nanoscience and nanotechnology that now brings together researchers from across physics, chemistry, biomedicine, materials science, engineering and industry.
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