Naresh Nibagani, Zhu Yijia, Fan Yujia, Luo Jingli, Wang Tianlei, Parkin Ivan P, Boruah Buddha Deka
Institute for Materials Discovery, University College London, London WC1E 7JE, United Kingdom.
Department of Chemistry, University College London, London WC1H 0AJ, U.K.
Nano Lett. 2024 Sep 4;24(35):11059-11066. doi: 10.1021/acs.nanolett.4c03194. Epub 2024 Aug 26.
The downsizing of microscale energy storage devices is crucial for powering modern on-chip technologies by miniaturizing electronic components. Developing high-performance microscale energy devices, such as micro-supercapacitors, is essential through processing smart electrodes for on-chip structures. In this context, we introduce porous gold (Au) interdigitated electrodes (IDEs) as current collectors for micro-supercapacitors, using polyaniline as the active material. These porous Au IDE-based symmetric micro-supercapacitors (P-SMSCs) show a remarkable enhancement in charge storage performance, with a 187% increase in areal capacitance at 2.5 mA compared to conventional flat Au IDE-based devices, despite identical active material loading times. Our P-SMSCs achieve an areal capacitance of 60 mF/cm, a peak areal energy density of 5.44 μWh/cm, and an areal power of 2778 μW/cm, surpassing most reported SMSCs. This study advances high-performance SMSCs by developing highly porous microscale planar current collectors, optimizing microelectrode use, and maximizing capacity within a compact footprint.
通过使电子元件小型化，微型储能设备的尺寸缩小对于为现代片上技术供电至关重要。通过为片上结构加工智能电极来开发高性能微型能量设备，如微型超级电容器，至关重要。在此背景下，我们引入多孔金（Au）叉指电极（IDE）作为微型超级电容器的集流体，使用聚苯胺作为活性材料。这些基于多孔金IDE的对称微型超级电容器（P-SMSC）在电荷存储性能方面有显著提升，尽管活性材料加载时间相同，但与传统基于平面金IDE的设备相比，在2.5 mA时面积电容增加了187%。我们的P-SMSC实现了60 mF/cm的面积电容、5.44 μWh/cm的峰值面积能量密度和2778 μW/cm的面积功率，超过了大多数已报道的SMSC。本研究通过开发高度多孔的微型平面集流体、优化微电极使用以及在紧凑的尺寸内最大化容量，推动了高性能SMSC的发展。
