Inkjet printing of silver/graphene flexible composite electrodes for high-performance supercapacitors

IF 4.8 2区 材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING
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Abstract

This study developed a silver/graphene flexible composite electrode using inkjet printing technology for high-performance supercapacitor. A rGO active layer was in-situ printed and reduced on the polypropylene non-woven fabric, and silver nanoparticles were simultaneously inserted and reduced to increase the interlayer spacing of the rGO active layer. This effectively reduced the self-stacking effect of rGO and improved the overall electrochemical performance. The successful in-situ reduction of GO and silver nitrate to rGO and silver nanoparticles was confirmed through morphological, structural, and surface chemical characterization. The 4Ag/rGO composite exhibits superior electrical conductivity, with a sheet resistance of 57.39 kΩ/sq., making it suitable for direct use as an electrode. In a three-electrode setup, these flexible composite electrodes demonstrated outstanding super capacitive performance, achieving a maximum specific capacitance of 800.30 F/g, excellent bendability, and remarkable cycle stability, with a capacitance retention of 104.9 % after over 2000 charge/discharge cycles at a current density of 0.25 mA/cm2. Furthermore, the composite electrodes exhibited a high energy density of up to 70.9 Wh/kg at a current density of 0.25 mA/cm2. The promising capacitive behavior and straightforward manufacturing process position the Ag/rGO hybrid electrodes as a potential material for future applications in next-generation flexible and wearable electronics.
喷墨打印用于高性能超级电容器的银/石墨烯柔性复合电极
本研究利用喷墨打印技术开发了一种用于高性能超级电容器的银/石墨烯柔性复合电极。在聚丙烯无纺布上原位印刷并还原 rGO 活性层,同时插入银纳米颗粒并还原,以增加 rGO 活性层的层间距。这有效降低了 rGO 的自堆积效应,提高了整体电化学性能。通过形态、结构和表面化学特性分析,证实了将 GO 和硝酸银成功地原位还原为 rGO 和银纳米粒子。4Ag/rGO 复合材料具有优异的导电性,其片层电阻为 57.39 kΩ/sq.,适合直接用作电极。在三电极设置中,这些柔性复合电极表现出卓越的超级电容性能,最大比电容达到 800.30 F/g,具有出色的可弯曲性和显著的循环稳定性,在 0.25 mA/cm2 的电流密度下,经过 2000 多次充放电循环后,电容保持率达到 104.9%。此外,在 0.25 mA/cm2 的电流密度下,复合电极的能量密度高达 70.9 Wh/kg。Ag/rGO 混合电极具有良好的电容特性和简单的制造工艺,是未来应用于下一代柔性和可穿戴电子设备的潜在材料。
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来源期刊
Materials Characterization
Materials Characterization 工程技术-材料科学:表征与测试
CiteScore
7.60
自引率
8.50%
发文量
746
审稿时长
36 days
期刊介绍: Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.
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