Abstract：
The assembly of two-dimensional (2D) nanomaterials into a three-dimensional (3D) aerogel can effectively prevent the problem of restacking. Here, nanofiber-reinforced MXene/reduced graphene oxide (rGO) conductive aerogel is prepared via the hydrothermal reduction of GO using pyrrole and in situ composite with MXene. Combined with low-content 2D conductive nanosheets (MXene and rGO) as \"brick\", conductive polypyrrole as \"mortar\", and one-dimensional (1D) nanofiber as \"rebar\", a strong interfacial cross-linking of MXene and rGO nanosheets is realized through covalent and noncovalent bonds to synergistically improve its mechanical performance. Based on the prepared MXene/rGO aerogel, a high-performance piezoresistive sensor with a sensitivity of up to 20.80 kPa-1 in a wide pressure range of 15.6 kPa is obtained, and it can withstand more than 5000 cyclic compressions. Besides, the sensor shows a stable output and can be applied to monitor various human motion signals. In addition, an all-solid-state supercapacitor electrode is also fabricated, which shows a high area-specific capacitance of up to 274 mF/cm2 at a current density of 1 mA/cm2.
摘要：
将二维（2D）纳米材料组装成三维（3D）气凝胶可以有效地防止重叠问题。这里,纳米纤维增强MXene/还原氧化石墨烯（rGO）导电气凝胶是通过使用吡咯对GO进行水热还原并与MXene原位复合制备的。结合低含量的2D导电纳米片（MXene和rGO）作为“砖”，导电聚吡咯作为“砂浆”，和一维(1D)纳米纤维作为“钢筋”，通过共价键和非共价键实现MXene和rGO纳米片的强界面交联，以协同改善其机械性能。基于制备的MXene/rGO气凝胶，获得了在15.6kPa的宽压力范围内灵敏度高达20.80kPa-1的高性能压阻式传感器，它可以承受超过5000次循环压缩。此外,传感器输出稳定，可用于监测各种人体运动信号。此外,还制造了全固态超级电容器电极，其在1mA/cm2的电流密度下显示高达274mF/cm2的高面积比电容。
