微波高压灭菌技术合成的V2O5/MWCNT纳米颗粒的形貌、光学和电化学性能研究

Q3 Materials Science JCIS open Pub Date : 2021-12-01 DOI:10.1016/j.jciso.2021.100032
V. Rajesh , K. Veeramuthu , C. Shiyamala
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引用次数: 7

摘要

为了克服锂离子电池固有电导率低、不可逆容量损失大、库仑效率低等问题,纳米结构碳金属氧化物复合材料得到了广泛的研究。研究了一种高效的微波热压合成技术,将V2O5融合到MWCNT链中。V2O5/MWCNT是一种混合纳米颗粒,具有超级电容器所需电极的关键特征,已被研究和报道。通过x射线衍射(XRD)峰分析,确定了纳米颗粒的相结构、空间基团和应变(ε)。采用Debye-Scherrer、modified Scherrer和均匀变形建模(UDM)模型计算颗粒尺寸。利用UV-Vis技术彻底解决了光子和电子之间的相互作用。光学常数,如折射率(n),吸收系数(α),和破坏系数(k)是解决这一结果。纳米粒子的介电函数(ε和εi)和直接带隙也被报道。随着V2O5/MWCNT的强光致发光(PL)发射,其独特的光学性质和巨大的实际应用潜力得到了深入的研究。通过傅里叶变换红外(FTIR)和x射线光电子能谱(XPS)对钒、氧和碳的分析,证实了V2O5/MWCNT的存在。扫描电镜(SEM)显微图像证实了V2O5/MWCNT纳米颗粒的形成。循环伏安法(CV)分析仪测量材料暴露于电化学作用时的最高比容量,632 Fg-1。在恒流充放电(GCD)额定值下,中位功率密度(E)预测为146 Whkg-1,功率密度(P)为1.52 kW kg-1。这些值有助于描述超级电容器的性能。
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Investigation of the morphological, optical and electrochemical capabilities of V2O5/MWCNT nanoparticles synthesized using a microwave autoclave technique

Metal oxide composites containing nanostructured carbons have been extensively researched to overcome difficulties such as low intrinsic electronic conductivity, significant irreversible capacity loss, and poor coulombic efficiency in lithium-ion batteries (LIBs). A time-efficient microwave autoclave synthesis technique was approached to fuse V2O5 to MWCNT strands. V2O5/MWCNT is a hybrid nanoparticle with crucial features for the electrode needed for a supercapacitor that has been investigated and reported. Due to X-ray diffraction (XRD) peak investigation, the nanoparticles' phase structure, space group, and strain(ε) have been determined. The particle size was calculated in Debye-Scherrer, modified Scherrer, and uniform deformation modeling (UDM) modes. The interaction between light photons and electrons is thoroughly addressed using UV–Vis technology. Optical constants like refractive index (n), absorption coefficient (α), and destructive coefficient (k) is addressed as a result of this. Nanoparticles' dielectric function (εrand εi), and direct bandgap have also been reported. Along with V2O5/MWCNT's strong Photoluminescence (PL) emission, interpretation of unique optical properties and considerable potential for practical applications have been intensively studied. V2O5/MWCNT is confirmed by data acquired by Fourier Transform Infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) for vanadium, oxygen, and carbon. The formation of nanoparticles with the dimensions of V2O5/MWCNT is proven by Scanning Electron Microscopic (SEM) micrographic imagery. A Cyclic Voltammetry (CV) analyzer measures the material's highest specific capacity when exposed to electrochemical action, 632 Fg-1. The median power density (E) is predicted to be 146 Whkg-1, and the power density (P) is 1.52 ​kW kg-1 in the Galvanostatic Charge/Discharging (GCD) rating. These values are beneficial for describing the capabilities of supercapacitors.

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来源期刊
JCIS open
JCIS open Physical and Theoretical Chemistry, Colloid and Surface Chemistry, Surfaces, Coatings and Films
CiteScore
4.10
自引率
0.00%
发文量
0
审稿时长
36 days
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