Recent advances in the development of self-powered devices and miniaturized electronics have increased the demand for on-chip energy storage devices that can deliver high power and energy densities in a limited footprint area. Here, we report the fabrication of all-solid-state micro-supercapacitors (MSCs) through a three-dimensional (3D) printing of additive-free and water-based MXene ink. The fabricated MSCs benefit from the high electrical conductivity and excellent electrochemical properties of two-dimensional (2D) Ti3C2Tx MXene and a 3D interdigital electrode architecture to deliver high areal and volumetric energy densities. We demonstrate that a highly concentrated MXene ink shows desirable viscoelastic properties for extrusion printing at room temperature and therefore can be used for scalable fabrication of MSCs with various architectures and electrode thicknesses on a variety of substrates. The developed printing process can be readily used for the fabrication of flexible MSCs on polymer and paper substrates. The printed solid-state devices show exceptional electrochemical performance with very high areal capacitance of up to ∼1035 mF cm-2. Our study introduces Ti3C2Tx MXene as an excellent choice of electrode material for the fabrication of 3D MSCs and demonstrates 3D printing of MXene inks at room temperature.

中文翻译：

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用于制造具有超高能量密度的微型超级电容器的无添加剂2D Ti3C2Tx（MXene）墨水的3D打印。

自供电设备和小型电子设备开发的最新进展增加了对片上能量存储设备的需求，该芯片可以在有限的占地面积内提供高功率和高能量密度。在这里，我们报告通过无添加剂和水基MXene油墨的三维（3D）打印制造全固态微型超级电容器（MSC）。所制造的MSC受益于二维（2D）Ti3C2Tx MXene的高电导率和出色的电化学性能，以及3D叉指式电极体系结构，可提供高的面和体积能量密度。我们证明了高浓度的MXene墨水在室温下显示出理想的粘弹性，可用于挤出印刷，因此可用于在各种基材上具有各种结构和电极厚度的MSC的可扩展制造。发达的印刷工艺可以很容易地用于在聚合物和纸张基材上制造柔性MSC。印刷的固态器件显示出卓越的电化学性能，具有高达〜1035 mF cm-2的极高面电容。我们的研究介绍了Ti3C2Tx MXene作为制造3D MSC的电极材料的绝佳选择，并演示了MXene油墨在室温下的3D打印。发达的印刷工艺可以很容易地用于在聚合物和纸张基材上制造柔性MSC。印刷的固态器件显示出卓越的电化学性能，具有高达〜1035 mF cm-2的极高面电容。我们的研究介绍了Ti3C2Tx MXene作为制造3D MSC的电极材料的绝佳选择，并演示了MXene油墨在室温下的3D打印。发达的印刷工艺可以很容易地用于在聚合物和纸张基材上制造柔性MSC。印刷的固态器件显示出卓越的电化学性能，具有高达〜1035 mF cm-2的极高面电容。我们的研究介绍了Ti3C2Tx MXene作为制造3D MSC的电极材料的绝佳选择，并演示了MXene油墨在室温下的3D打印。