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Scalable, Self-Aligned Printing of Flexible Graphene Micro-Supercapacitors

机译：柔性石墨烯微型超级电容器的可扩展，自对准打印

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摘要

Graphene micro-supercapacitors (MSCs) are an attractive energy storage technology for powering miniaturized portable electronics. Despite considerable advances in recent years, device fabrication typically requires conventional microfabrication techniques, limiting the translation to cost-effective and high-throughput production. To address this issue, we report here a self-aligned printing process utilizing capillary action of liquid inks in microfluidic channels to realize scalable, high-fidelity manufacturing of graphene MSCs. Microstructured ink receivers and capillary channels are imprinted on plastic substrates and filled by inkjet printing of functional materials into the receivers. The liquid inks move under capillary flow into the adjoining channels, allowing reliable patterning of electronic materials in complex structures with greatly relaxed printing tolerance. Leveraging this process with pristine graphene and ion gel inks, miniaturized all-solid-state graphene MSCs are demonstrated to concurrently achieve outstanding resolution (active footprint: <1 mm(2), minimum feature size: 20 mu m) and yield (44/44 devices), while maintaining a high specific capacitance (268 mu F cm(-2)) and robust stability to extended cycling and bending, establishing an effective route to scale down device size while scaling up production throughput.
机译：石墨烯微超级电容器（MSC）是一种为小型便携式电子设备供电的有吸引力的能量存储技术。尽管近年来取得了很大的进步，但是器件制造通常需要常规的微制造技术，从而将转换限制在了具有成本效益的高通量生产中。为了解决这个问题，我们在这里报告了一种自动对齐的打印过程，该过程利用微流体通道中液体墨水的毛细作用来实现可扩展的，高保真度的石墨烯MSC的制造。将微结构化的墨水接收器和毛细管通道压印在塑料基板上，并通过将功能材料喷墨打印到接收器中进行填充。液态墨水在毛细作用下移动到相邻的通道中，从而使电子材料在复杂结构中可靠地图案化，并大大降低了打印公差。利用原始石墨烯和离子凝胶油墨的这一工艺，已证明小型化的全固态石墨烯MSC可同时实现出色的分辨率（有效占地面积：<1 mm（2），最小特征尺寸：20μm）和产率（44 / 44个器件），同时保持较高的比电容（268μF cm（-2））和对扩展的循环和弯曲具有鲁棒的稳定性，从而建立了一条有效的途径来缩小器件尺寸，同时提高生产效率。

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  • 来源
    《Advanced energy materials》 |2017年第17期|1700285.1-1700285.8|共8页
  • 作者

    Hyun Woo Jin; Secor Ethan B.; Kim Chang-Hyun; Hersam Mark C.; Francis Lorraine F.; Frisbie C. Daniel;

  • 作者单位

    Univ Minnesota, Dept Chem Engn & Mat Sci, 421 Washington Ave SE, Minneapolis, MN 55455 USA;

    Northwestern Univ, Dept Mat Sci & Engn, 2220 Campus Dr, Evanston, IL 60208 USA;

    Univ Minnesota, Dept Chem Engn & Mat Sci, 421 Washington Ave SE, Minneapolis, MN 55455 USA;

    Northwestern Univ, Dept Mat Sci & Engn, 2220 Campus Dr, Evanston, IL 60208 USA|Northwestern Univ, Dept Elect Engn & Comp Sci, Dept Chem, Evanston, IL 60208 USA;

    Univ Minnesota, Dept Chem Engn & Mat Sci, 421 Washington Ave SE, Minneapolis, MN 55455 USA;

    Univ Minnesota, Dept Chem Engn & Mat Sci, 421 Washington Ave SE, Minneapolis, MN 55455 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    flexible electronics; graphene; ion gel; micro-supercapacitors; printed electronics;

    机译：柔性电子产品;石墨烯;离子凝胶;微型超级电容器;印刷电子产品;

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