Rani Shalu, Khandelwal Gaurav, Tandon Abhinav, Kumar Sanjay, Aliyana Akshaya Kumar, Pillai Suresh C, Stylios George K, Gadegaard Nikolaj, Mulvihill Daniel M
Department of Electronics Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand 826004, India.
James Watt School of Engineering, University of Glasgow, Glasgow G12 8QQ, U.K.
ACS Appl Mater Interfaces. 2025 Jul 9;17(27):39108-39117. doi: 10.1021/acsami.5c06545. Epub 2025 Jun 25.
The growing demand for wearable electronics has driven interest in flexible fiber-based supercapacitors (F-SCs) as power sources, offering tunable sizes, adaptable shapes, and versatile design possibilities. This study presents the fabrication of a highly flexible and twistable fiber-shaped yarn supercapacitor (F-SC) via direct electrodeposition of ternary metal-oxide nanostructures (ZnMnO) onto flexible and conductive carbon yarn substrates. The uniform growth of ZnMnO nanostructures on the carbon yarn not only enhances the capacitive performance of the fabricated devices but also significantly enhances the mechanical integrity of the electrodes, ensuring excellent bending and electrochemical stability for the F-SC device. The device exhibits a high areal capacitance of 87.6 mF/cm at a scan rate of 10 mV/s and 35.4 mF/cm at a current density of 0.1 mA/cm. Furthermore, it retains 92% of its capacitance after 10,000 charge-discharge cycles, achieving energy and power densities of 11 μWh/cm and 385 μW/cm, and maintaining consistent performance under varying bending and twisting conditions. This work offers a simple, cost-effective, and efficient strategy for developing flexible and twistable fiber electrodes using a straightforward electrodeposition process. The fabricated electrodes hold great potential in developing flexible energy storage technologies and enabling seamless integration into next-generation portable and wearable electronics.
对可穿戴电子产品不断增长的需求激发了人们对基于柔性纤维的超级电容器（F-SC）作为电源的兴趣，因为它具有可调节的尺寸、可适应的形状和多样的设计可能性。本研究通过将三元金属氧化物纳米结构（ZnMnO）直接电沉积到柔性导电碳纱基材上，展示了一种高度柔性且可扭曲的纤维状纱线超级电容器（F-SC）的制造方法。ZnMnO纳米结构在碳纱上的均匀生长不仅提高了所制造器件的电容性能，还显著增强了电极的机械完整性，确保了F-SC器件具有出色的弯曲和电化学稳定性。该器件在扫描速率为10 mV/s时表现出87.6 mF/cm²的高面积电容，在电流密度为0.1 mA/cm²时为35.4 mF/cm²。此外，在10000次充放电循环后，它保留了92%的电容，实现了11 μWh/cm²的能量密度和385 μW/cm²的功率密度，并在不同的弯曲和扭曲条件下保持一致的性能。这项工作提供了一种简单、经济高效的策略，通过直接电沉积工艺开发柔性且可扭曲的纤维电极。所制造的电极在开发柔性储能技术以及无缝集成到下一代便携式和可穿戴电子产品方面具有巨大潜力。
