Flexible nanofiber web electrode with high surface area and capacitance for electrochemical capacitor

IF 2.8 4区工程技术 Q2 POLYMER SCIENCE

Macromolecular Research Pub Date : 2024-08-07 DOI:10.1007/s13233-024-00308-z

Soo Jung Lee, Jun Young Lee

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Abstract

Flexible, lightweight electrode for electrochemical capacitor with high surface area and capacitance was successfully prepared based on the electrospun poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) nanofiber web. Electrode was fabricated by three steps. First, PVDF-HFP nanofiber web was formed by electrospinning. Platinum (Pt) thin layer as a current collector was then deposited on the electrospun PVDF-HFP nanofiber web by an electroless plating and followed by deposition of manganese dioxide (MnO₂) using a hydrothermal method, finally producing MnO₂/Pt/PVDF-HFP nanofiber web electrode. We confirmed formation of MnO₂/Pt/PVDF-HFP nanofiber web electrode with desired structure and chemical composition. The galvanic charge–discharge specific capacitance of the flexible MnO₂/Pt/PVDF-HFP nanofiber web electrode was 201.4 F/g at current density of 1 mA/cm². Even after 1000 bending cycles, specific capacitance obtained from cyclic voltammetry of the nanofiber web electrode maintained up to 88.8% of the initial capacitance, implying excellent bending durability of the electrode. Since MnO₂/Pt/PVDF-HFP nanofiber web electrode exhibited excellent electrochemical activity and mechanical flexibility, we expect potential applications in flexible, wearable, and stretchable electronic devices.

Graphic abstract

Scheme of fabrication process and surface and cross-section of MnO₂/Pt/PVDF-HFP nanofiber web

Abstract Image

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用于电化学电容器的具有高比表面积和电容的柔性纳米纤维网电极

基于电纺丝聚偏氟乙烯-六氟丙烯（PVDF-HFP）纳米纤维网，成功制备了具有高比表面积和电容的柔性轻质电化学电容器电极。电极的制备分为三个步骤。首先，通过电纺丝形成 PVDF-HFP 纳米纤维网。然后，通过无电解电镀法在电纺丝 PVDF-HFP 纳米纤维网上沉积作为集流体的铂（Pt）薄层，再通过水热法沉积二氧化锰（MnO2），最终制成 MnO2/Pt/PVDF-HFP 纳米纤维网电极。我们证实 MnO2/Pt/PVDF-HFP 纳米纤维网电极具有理想的结构和化学成分。在电流密度为 1 mA/cm2 时，柔性 MnO2/Pt/PVDF-HFP 纳米纤维网电极的电荷-放电比电容为 201.4 F/g。即使在经过 1000 次弯曲循环后，纳米纤维网电极的循环伏安法获得的比电容仍保持在初始电容的 88.8%，这意味着电极具有极佳的弯曲耐久性。由于 MnO2/Pt/PVDF-HFP 纳米纤维网电极表现出优异的电化学活性和机械柔韧性，我们期待它在柔性、可穿戴和可拉伸电子设备中的潜在应用。图文摘要 MnO2/Pt/PVDF-HFP 纳米纤维网的制备工艺原理、表面和横截面图

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来源期刊

Macromolecular Research 工程技术-高分子科学

CiteScore

4.70

自引率

8.30%

发文量

100

审稿时长

1.3 months

期刊介绍： Original research on all aspects of polymer science, engineering and technology, including nanotechnology Presents original research articles on all aspects of polymer science, engineering and technology Coverage extends to such topics as nanotechnology, biotechnology and information technology The English-language journal of the Polymer Society of Korea Macromolecular Research is a scientific journal published monthly by the Polymer Society of Korea. Macromolecular Research publishes original researches on all aspects of polymer science, engineering, and technology as well as new emerging technologies using polymeric materials including nanotechnology, biotechnology, and information technology in forms of Articles, Communications, Notes, Reviews, and Feature articles.