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On-Chip 3D Interdigital Micro-Supercapacitors with Ultrahigh Areal Energy Density
Energy Storage Materials ( IF 20.4 ) Pub Date : 2020-01-10 , DOI: 10.1016/j.ensm.2020.01.008
Fei Li , Ming Huang , Jinhui Wang , Jiang Qu , Yang Li , Lixiang Liu , Vineeth Kumar Bandari , Yu Hong , Bingkun Sun , Minshen Zhu , Feng Zhu , Yu Xin Zhang , Oliver G. Schmidt

The great development of lightweight and portable smart electronic devices has significantly stimulated the interests in exploring and developing miniaturized energy storage systems. High-performance micro-supercapacitors (MSCs) with three-dimensional (3D) nanostructures show a great potential to improve energy storage capability, and these types of MSCs are regarded as ideal stand-alone power sources for smart microelectronics. Here, Cu0.56Co2.44O4@MnO2 core–shell nanoflowers and carbon nanotubes are integrated into a 3D hybrid asymmetric MSC with a fast, convenient, and scalable production fashion. Due to the hierarchical structure of the 3D electrodes and active materials, the hybrid MSC exhibits an improved specific areal capacitance of 665.3 mF cm-2 at 3.2 mA cm−2 and an excellent cycling performance of 89.8% retention after 8000 cycles. The MSC also shows an ultrahigh energy density of 182.3 μW h cm−2, which is higher than almost all the previously reported energy density values of on-chip interdigital-electrode MSCs. The efficient fabrication methodology of both the materials and the device demonstrated in this work show great potential in developing high performance3D MSCs.



中文翻译:

具有超高区域能量密度的片上3D叉指式微型超级电容器

轻便和便携式智能电子设备的飞速发展极大地激发了人们对探索和开发小型化能量存储系统的兴趣。具有三维(3D)纳米结构的高性能微型超级电容器(MSC)显示出巨大的潜力,可以提高能量存储能力,这些类型的MSC被认为是智能微电子的理想独立电源。此处,Cu 0.56 Co 2.44 O 4 @MnO 2核壳纳米花和碳纳米管以快速,便捷和可扩展的生产方式集成到3D混合不对称MSC中。由于3D电极和活性材料的层次结构,混合MSC在3.2 mA cm -2处显示出665.3 mF cm -2的改进的比表面积电容,并在8000次循环后保持了89.8%的出色循环性能。MSC还显示出182.3μWh cm -2的超高能量密度,该能量密度几乎高于芯片上叉指电极MSC先前报告的几乎所有能量密度值。在这项工作中展示的材料和设备的有效制造方法在开发高性能3D MSC中显示出巨大潜力。

更新日期:2020-01-11
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