Enhanced electrochemical stability of poly(pyridylthiophene) with zirconium dioxide/zirconium disulphide nanocomposites for high-performance supercapacitors

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Science and Engineering: B Pub Date : 2024-11-23 DOI:10.1016/j.mseb.2024.117856

Joseph Raj Xavier

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Abstract

Zirconium dioxide (ZrO₂) and zirconium disulphide (ZrS₂) nanoparticles were added to poly(pyridylthiophene) (PPT) to improve its electrochemical stability. Characterization and comparison with pristine PPT were conducted to understand the surface influence, crystalline structure, and electrochemical performance of the PPT/ZrO₂/ZrS₂ material. Without reducing its available specific capacitance, surface modification can increase PPT’s structural stability. Through the use of AC impedance and cyclic voltammetry (CV) methods in a 3 M KOH electrolyte, the electrochemical characteristics of the produced PPT/ZrO₂/ZrS₂ electrode were assessed. PPT, PPT/ZrO₂, PPT/ZrS₂, and PPT/ZrO₂/ZrS₂ each had specific capacitances of 265, 655, 747, and 1326F/g at 5 A/g. The Zr⁴⁺ ions’ synergistic impact in the PPT/ZrO₂/ZrS₂ electrode material is responsible for this improvement. The energy and power density of the PPT/ZrO₂/ZrS₂ electrode in KOH are 166 Wh kg⁻¹ and 664 W kg⁻¹, respectively. After 10,000 cycles, the capacitance only loses 4 % of its initial value. The resulting PPT/ZrO₂/ZrS₂ nanocomposite included multilayer structures that were extremely stable and porous. The PPT/ZrO₂/ZrS₂ nanocomposites perform well electrochemically and structurally, making them suitable materials for use in supercapacitors.

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增强聚（吡啶基噻吩）与二氧化锆/二硫化锆纳米复合材料在高性能超级电容器中的电化学稳定性

在聚吡啶噻吩（PPT）中添加了二氧化锆（ZrO2）和二硫化锆（ZrS2）纳米粒子，以提高其电化学稳定性。为了了解 PPT/ZrO2/ZrS2 材料的表面影响、晶体结构和电化学性能，对其进行了表征并与原始 PPT 进行了比较。在不降低其可用比电容的情况下，表面改性可以提高 PPT 的结构稳定性。通过在 3 M KOH 电解液中使用交流阻抗和循环伏安（CV）方法，对制备的 PPT/ZrO2/ZrS2 电极的电化学特性进行了评估。在 5 A/g 时，PPT、PPT/ZrO2、PPT/ZrS2 和 PPT/ZrO2/ZrS2 的比电容分别为 265、655、747 和 1326F/g。PPT/ZrO2/ZrS2 电极材料中 Zr4+ 离子的协同作用是造成这种改善的原因。PPT/ZrO2/ZrS2 电极在 KOH 中的能量和功率密度分别为 166 Wh kg-1 和 664 W kg-1。经过 10,000 次循环后，电容只损失了初始值的 4%。由此产生的 PPT/ZrO2/ZrS2 纳米复合材料包括多层结构，非常稳定且多孔。PPT/ZrO2/ZrS2 纳米复合材料具有良好的电化学性能和结构，是超级电容器的理想材料。

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来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.