Scholarlink

<p>Designing a stable and efficient charge storage system presents a persistent bottleneck due to limitations in structural integrity and ion transport over prolonged cycles. Modifying the interlayer region within layered host materials has offered a promising avenue, although the underlying structure–function correlation is largely unexplored. In this study, we demonstrate hydrothermally synthesized V<sub>6</sub>O<sub>13</sub>.nH<sub>2</sub>O with an intercalated water network as a promising electrode material for supercapacitor applications. Structural and surface analyses using X-ray diffraction. X-ray photoelectron spectroscopy, scanning electron microscopy and transmission electron microscopy validate the mixed-valence nature and layered framework of the hydrated vanadium oxide. The phase composition and effects of water intercalation were studied using FTIR spectroscopy, Raman spectroscopy and thermogravimetry. The extended hydrogen-bonded network formed by the interlayer water increases the interlayer spacing, allowing efficient proton transport and enhanced pseudo-capacitance behaviour, while the water pillars enhance crystal structural stability. Electrochemical investigations of the electrode exhibited a significant specific capacitance of ~ 232&#xa0;F&#xa0;g<sup>−1</sup>, power density of ~ 0.9&#xa0;kW&#xa0;kg<sup>−1</sup> and energy density of ~ 29&#xa0;Wh&#xa0;kg<sup>−1</sup> at 0.5&#xa0;A&#xa0;g<sup>−1</sup>. The electrode showcased good rate capability and cycling performance, retaining ~ 87% of its capacitance over 2000 cycles.</p> Graphical abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Crystal water-driven ion pathways in layered vanadium oxide for improved supercapacitor performance

  • 期刊论文

  • 发表日期：

    2026年3月19日

查看全文
  • Raj Laxmi,
  • Ashutosh Raj,
  • Mohammad Muhiuddin,
  • K. Udaya Bhat,
  • Mohammad Rizwanur Rahman,
  • Mahipal Ranot,
  • A. V. Anupama

摘要

Designing a stable and efficient charge storage system presents a persistent bottleneck due to limitations in structural integrity and ion transport over prolonged cycles. Modifying the interlayer region within layered host materials has offered a promising avenue, although the underlying structure–function correlation is largely unexplored. In this study, we demonstrate hydrothermally synthesized V6O13.nH2O with an intercalated water network as a promising electrode material for supercapacitor applications. Structural and surface analyses using X-ray diffraction. X-ray photoelectron spectroscopy, scanning electron microscopy and transmission electron microscopy validate the mixed-valence nature and layered framework of the hydrated vanadium oxide. The phase composition and effects of water intercalation were studied using FTIR spectroscopy, Raman spectroscopy and thermogravimetry. The extended hydrogen-bonded network formed by the interlayer water increases the interlayer spacing, allowing efficient proton transport and enhanced pseudo-capacitance behaviour, while the water pillars enhance crystal structural stability. Electrochemical investigations of the electrode exhibited a significant specific capacitance of ~ 232 F g−1, power density of ~ 0.9 kW kg−1 and energy density of ~ 29 Wh kg−1 at 0.5 A g−1. The electrode showcased good rate capability and cycling performance, retaining ~ 87% of its capacitance over 2000 cycles.

Graphical abstract