A novel method for preparing NH4+-PEDOT-co-doped VxOy Nanoneedles as cathode material in zinc-ion batteries

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-10-03 DOI:10.1016/j.matlet.2025.139598

Filipp S. Volkov, Svetlana N. Eliseeva

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Abstract

A novel hydrothermal synthesis method has been developed for preparing an NH₄⁺-PEDOT-co-doped vanadium oxide (NVOP) cathode for zinc-ion batteries. Structural characterization reveals successful PEDOT (poly(3,4-ethylenedioxythiophene) intercalation within V_xO_y layers, evidenced by an expanded interlayer spacing (10.23 Å, XRD), homogeneous elemental distribution (EDX), and characteristic polymer signatures (FTIR/XPS). The NVOP-based cathode demonstrates excellent specific capacity, outperforming undoped NH₄V₃O₈ (NVO) by more than twofold across all current densities. Specifically, the NVOP cathode exhibits a high specific capacity of 403 mAh·g⁻¹ at 0.3 A·g⁻¹ and exceptional rate capability (246 mAh·g⁻¹ at 10 A·g⁻¹). Furthermore, during long-term cycling at 1 A·g⁻¹, NVOP maintained a specific capacity of 340 mAh·g⁻¹ by the 100th cycle without degradation.

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一种制备NH4+- pedot共掺杂VxOy纳米针锌离子电池正极材料的新方法

研究了一种新的水热合成方法，用于制备锌离子电池用NH4+- pedot共掺杂氧化钒（NVOP）阴极。结构表征表明PEDOT（聚（3,4-乙烯二氧噻吩））成功嵌入VxOy层中，层间距扩大（10.23 Å， XRD），元素均匀分布（EDX）和特征聚合物特征（FTIR/XPS）证明了这一点。基于nvop的阴极具有优异的比容量，在所有电流密度下都比未掺杂的NH4V3O8 （NVO）高出两倍以上。具体来说，NVOP阴极在0.3 a·g−1时具有403 mAh·g−1的高比容量和在10 a·g−1时具有246 mAh·g−1的特殊倍率能力。此外，在1 A·g−1的长期循环中，NVOP在第100次循环时保持了340 mAh·g−1的比容量而没有退化。

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive