用于氧化还原超级电容器应用的纳米纤维NiMoO/g-CN复合电极材料

Nanofiber NiMoO/g-CN Composite Electrode Materials for Redox Supercapacitor Applications.

作者信息

Thiagarajan Kannadasan, Bavani Thirugnanam, Arunachalam Prabhakarn, Lee Seung Jun, Theerthagiri Jayaraman, Madhavan Jaganathan, Pollet Bruno Georges, Choi Myong Yong

机构信息

Solar Energy Lab, Department of Chemistry, Thiruvalluvar University, Vellore 632 115, India.

Electrochemistry Sciences Research Chair (ESRC), Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.

出版信息

Nanomaterials (Basel). 2020 Feb 23;10(2):392. doi: 10.3390/nano10020392.

DOI:10.3390/nano10020392

PMID:32102243

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7075326/

Abstract

NiMoO/g-CN was fabricated by a hydrothermal method and used as an electrode material in a supercapacitor. The samples were characterized by XRD, FTIR, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) to study the physical and structural properties of the as-prepared NiMoO/g-CN material. The electrochemical responses of pristine NiMoO and the NiMoO/g-CN nanocomposite material were investigated by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS). From the CD studies, the NiMoO/g-CN nanocomposite revealed a higher maximum specific capacitance (510 Fg) in comparison to pristine NiMoO (203 Fg). In addition, the NiMoO/g-CN composite electrode material exhibited high stability, which maintained up to 91.8% capacity even after 2000 charge-discharge cycles. Finally, NiMoO/g-CN was found to exhibit an energy density value of 11.3 Whkg. These findings clearly suggested that NiMoO/g-CN could be a suitable electrode material for electrochemical capacitors.

摘要

通过水热法制备了NiMoO/g-CN，并将其用作超级电容器的电极材料。采用X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）对样品进行表征，以研究所制备的NiMoO/g-CN材料的物理和结构性质。通过循环伏安法（CV）、恒电流充放电（GCD）和电化学阻抗谱（EIS）研究了原始NiMoO和NiMoO/g-CN纳米复合材料的电化学响应。从充放电研究中可以看出，与原始NiMoO（203 F/g）相比，NiMoO/g-CN纳米复合材料显示出更高的最大比电容（510 F/g）。此外，NiMoO/g-CN复合电极材料表现出高稳定性，即使在2000次充放电循环后仍保持高达91.8%的容量。最后，发现NiMoO/g-CN的能量密度值为11.3 Wh/kg。这些发现清楚地表明，NiMoO/g-CN可能是一种适用于电化学电容器的电极材料。