Abstract：
Graphene oxide (GO)-based all-solid-state supercapacitors (SCs) provide an important complement to liquid- and gel-electrolyte-based SCs in a variety of applications, including flexible electronics. Still, their mediocre capacitance and complex fabrication methods hold back the realization of their full potential. Here, a simple fabrication of all-solid-state SCs with layered GO as a solid electrolyte and MXene as electrodes is demonstrated. The resultant SCs show excellent energy storage capacitance comparable to other MXene-based SCs using liquid electrolytes. The outperformance is attributed to extra interlayer spacing expansion and improved ion transport kinetics thanks to a synergistic water-absorbing effect due to the hydrophilicity of both MXene and GO in combination, which interestingly satisfies the intrinsic surface-dominated pseudocapacitive behavior of MXene. The application of this SC in humidity sensing has also been demonstrated to be fast responsive. The findings describe in this work provide a means of improving the capacitance performance using GO as a solid electrolyte with MXene as the electrodes and exploit the potential application as electronic elements for smart devices.
摘要：
基于氧化石墨烯（GO）的全固态超级电容器（SC）在各种应用中为基于液体和凝胶电解质的SC提供了重要的补充。包括柔性电子。尽管如此，它们平庸的电容和复杂的制造方法阻碍了它们充分发挥潜力。这里,证明了以层状GO作为固体电解质和MXene作为电极的全固态SC的简单制造。与使用液体电解质的其他基于MXene的SC相比,所得SC显示出优异的储能电容。优异的性能归因于额外的层间间距扩展和改善的离子传输动力学，这得益于MXene和GO组合的亲水性的协同吸水效应，有趣地满足了MXene的固有表面支配的伪电容行为。这种SC在湿度传感中的应用也被证明是快速响应的。这项工作中描述的发现提供了一种使用GO作为固体电解质以MXene作为电极改善电容性能的方法，并开发了作为智能设备电子元件的潜在应用。
