High volumetric-energy-density flexible supercapacitors based on PEDOT:PSS incorporated with carbon quantum dots hybrid electrodes

IF 11.2 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Materials Science & Technology Pub Date : 2024-11-08 DOI:10.1016/j.jmst.2024.08.073
Dinh Cung Tien Nguyen, Seonghan Kim, Bo-Seok Kim, Sejung Kim, Soo-Hyoung Lee
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Abstract

Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is a highly successful conductive polymer utilized as an electrode material in energy storage units for portable and wearable electronic devices. Nevertheless, employing PEDOT:PSS in supercapacitors (SC) in its pristine state presents challenges due to its suboptimal electrochemical performance and operational instability. To surmount these limitations, PEDOT:PSS has been integrated with carbon-based materials to form flexible electrodes, which exhibit physical and chemical stability during SC operation. We developed a streamlined fabrication process for high-performance SC electrodes composed of PEDOT:PSS and carbon quantum dots (CQDs). The CQDs were synthesized under microwave irradiation, yielding green- and red-light emissions. Through optimizing the ratios of CQDs to PEDOT:PSS, the SC electrodes were prepared using a spray-coating technique, marking a significant improvement in device performance with a high volumetric capacitance (104.10 F cm−3), impressive energy density (19.68 Wh cm−3), and excellent cyclic stability, retaining ∼85% of its original volumetric capacitance after 15,000 repeated GCD cycles. Moreover, the SCs, when utilized as a flexible substrate, demonstrated the ability to maintain up to ∼85% of their electrochemical performance even after 3,000 bending cycles (at a bending angle of 60°). These attributes render this hybrid composite an ideal candidate for a lightweight smart energy storage component in portable and wearable electronic technologies.

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基于 PEDOT:PSS 与碳量子点混合电极的高体积能量密度柔性超级电容器
聚(3,4-亚乙二氧基噻吩):聚(苯乙烯磺酸)(PEDOT:PSS)是一种非常成功的导电聚合物,可用作便携式和可穿戴电子设备储能装置的电极材料。然而,由于 PEDOT:PSS 的电化学性能不理想且操作不稳定,因此在超级电容器(SC)中使用原始状态的 PEDOT:PSS 会面临挑战。为了克服这些限制,PEDOT:PSS 已与碳基材料集成,形成柔性电极,在超级电容器运行期间表现出物理和化学稳定性。我们开发了一种由 PEDOT:PSS 和碳量子点 (CQD) 组成的高性能 SC 电极的简化制造工艺。CQDs 是在微波辐照下合成的,可发出绿光和红光。通过优化 CQDs 与 PEDOT:PSS 的比例,利用喷涂技术制备出了 SC 电极,显著提高了器件性能,具有高体积电容(104.10 F cm-3)、惊人的能量密度(19.68 Wh cm-3)和出色的循环稳定性,在重复 15,000 次 GCD 循环后仍能保持其原始体积电容的 85%。此外,在用作柔性衬底时,即使经过 3,000 次弯曲循环(弯曲角度为 60°),这种 SC 仍能保持高达 ∼ 85% 的电化学性能。这些特性使这种混合复合材料成为便携式和可穿戴电子技术中轻质智能储能元件的理想候选材料。
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来源期刊
Journal of Materials Science & Technology
Journal of Materials Science & Technology 工程技术-材料科学:综合
CiteScore
20.00
自引率
11.00%
发文量
995
审稿时长
13 days
期刊介绍: Journal of Materials Science & Technology strives to promote global collaboration in the field of materials science and technology. It primarily publishes original research papers, invited review articles, letters, research notes, and summaries of scientific achievements. The journal covers a wide range of materials science and technology topics, including metallic materials, inorganic nonmetallic materials, and composite materials.
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