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<p>Vanadium-based compounds have been extensively researched in electrochromism due to their cathodic and anodic coloring properties. In this paper, Na₂V₆O₁₆·2.1H₂O (SVO) nanorods, composed of V₃O₈ layers and interstitial hydrated sodium ions, were synthesized by the hydrothermal method and employed as electrode materials. The structural and morphological characteristics of the SVO nanorods and films were analyzed through X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and related testing techniques. The electrochemical performance of the films was measured by cyclic voltammetry (CV) and chronoamperometry (CA). The optical properties were examined using an ultraviolet–visible-near-infrared (UV–Vis-NIR) spectrophotometer. The findings indicated that hydrated sodium ions acted as "pillars," expanding the layer spacing of the material. In a Zn<sup>2</sup>⁺/Na⁺ hybrid electrolyte, the cycling stability of the SVO films was 45.58% better than that of the vanadium pentoxide films. Additionally, the response time was reduced by 25.35%, and the reflectance contrast was enhanced by 7.11%, highlighting their potential for electrochromic applications.</p>

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Electrochromic properties of Na2V6O16·2.1H2O nanorod films in Zn2+/Na+ hybrid electrolyte

  • 期刊论文

  • 发表日期：

    2025年3月6日

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  • Yuqing Zhang,
  • Shichuang Cui,
  • Juan Zhang,
  • Wei Wei,
  • Ziluo Yin,
  • Desheng Chen,
  • Jinrun Zha,
  • Quanyao Zhu

摘要

Vanadium-based compounds have been extensively researched in electrochromism due to their cathodic and anodic coloring properties. In this paper, Na₂V₆O₁₆·2.1H₂O (SVO) nanorods, composed of V₃O₈ layers and interstitial hydrated sodium ions, were synthesized by the hydrothermal method and employed as electrode materials. The structural and morphological characteristics of the SVO nanorods and films were analyzed through X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and related testing techniques. The electrochemical performance of the films was measured by cyclic voltammetry (CV) and chronoamperometry (CA). The optical properties were examined using an ultraviolet–visible-near-infrared (UV–Vis-NIR) spectrophotometer. The findings indicated that hydrated sodium ions acted as "pillars," expanding the layer spacing of the material. In a Zn2⁺/Na⁺ hybrid electrolyte, the cycling stability of the SVO films was 45.58% better than that of the vanadium pentoxide films. Additionally, the response time was reduced by 25.35%, and the reflectance contrast was enhanced by 7.11%, highlighting their potential for electrochromic applications.