论文标题
全墨捷印刷纳米片异质结构中的可调电容
Tunable capacitance in all-inkjet-printed nanosheet heterostructures
论文作者
论文摘要
由二维构建块构建的异质结构已显示出对现场效应晶体管，内存设备，光电传感器和其他电子应用的希望1,2。 2D纳米片晶体可以使用逐层方法3构建到多层异质结构中，但是由于该过程的耗时性和低效率，该方法不能用于制造大规模和较厚的异质结构。沉积不同二维材料的另一种方法是通过喷墨打印4-7。在这里，我们将喷墨打印TI3C2TX MXENE纳米片和氧化石墨烯纳米片作为固态电解质来显示纳米片超级电容器的制造。被困在石墨烯氧化石材片之间的游离水分子促进质子通过分层固体电解质8的运动。正式的超级电容器表现出与现有的印刷超级电容器相当的高面积电容，良好的循环稳定性以及高面积的能量和功率密度。此外，可以通过添加液体电解质进一步增加特定的电容。
Heterostructures constructed from two-dimensional building blocks have shown promise for field-effect transistors, memory devices, photosensors and other electronic applications1,2. 2D nanosheet crystals can be constructed into multilayer heterostructures using layer-by-layer methods3, but that method cannot be used to fabricate large-scale and thick heterostructures, due to the time-consuming nature and low efficiency of the process. An alternative approach to deposit different two-dimensional materials is by inkjet printing4-7. Here we show the fabrication of a nanosheet supercapacitor by inkjet printing Ti3C2Tx MXene nanosheets as electrodes, and graphene oxide nanosheets as solid-state electrolyte. The free water molecules trapped between graphene oxide sheets facilitate proton movement through the layered solid electrolyte8. The as-made supercapacitor shows high areal capacitance, good cycling stability and high areal energy and power densities comparable with existing printed supercapacitors. Moreover, the specific capacitance can be increased further by addition of liquid electrolytes.
