Ramification of Li-ion array on structural, optical and electrical properties of vanadium pentoxide for energy-efficient material

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta Pub Date : 2025-01-06 DOI:10.1016/j.electacta.2025.145659

Minal A. Bhatt, Ashish R. Tanna

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引用次数: 0

Abstract

The Li-ion doping in V₂O₅ leads to structural distortion, which results in modifications to the optical and electrical properties of the material. The X-ray diffractometer (XRD) measurement reveals orthorhombic and monoclinic structures for the present system. There is a significant change in the optical energy band which decreases from 3.37 eV to 2.44 eV, evaluated from Tauc extrapolation. The relation between energy band gap and refractive index is derived using different theoretical fitting formulas. The Reflectivity, reflection loss, and transmission coefficient values gradually decrease as Li-ion content increases. The molar refractive index (R_m) and molar electronic polarizability (α_e) decrease from 29.99 cm³/mol to 28.54 cm³/mol and 11.893Å³ to 11.318Å³, respectively. The complex impedance and modulus spectra evaluate the electrical and dielectric properties of the vanadium pentoxide. The equivalent circuits have been analyzed for the complex dielectric parameters using Cole-Cole plots, and the electrical modulus shows the non-Debye type relaxation process. The analysis demonstrates the vital role of these materials in future electrochromic smart window devices (EC-SM) and optoelectronic applications.

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锂离子阵列衍生物对节能材料五氧化二钒结构、光学和电学性能的影响

在 V₂O₅ 中掺入锂离子会导致结构变形，从而改变材料的光学和电学特性。X 射线衍射仪（XRD）测量显示，本系统具有正交和单斜结构。根据陶氏外推法的评估，光学能带发生了重大变化，从 3.37 eV 下降到 2.44 eV。能带隙与折射率之间的关系是通过不同的理论拟合公式得出的。随着锂离子含量的增加，反射率、反射损耗和透射系数值逐渐降低。摩尔折射率（Rm）和摩尔电子极化率（αe）分别从 29.99 cm3/mol 降至 28.54 cm3/mol 和 11.893Å3 降至 11.318Å3。复阻抗和模量光谱评估了五氧化二钒的电学和介电特性。利用科尔-科尔图分析了复介电参数的等效电路，电模量显示了非德拜型弛豫过程。分析表明了这些材料在未来的电致变色智能窗设备（EC-SM）和光电应用中的重要作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Electrochimica Acta 工程技术-电化学

CiteScore

11.30

自引率

6.10%

发文量

1634

审稿时长

41 days

期刊介绍： Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.