The graphene-based microsupercapacitors (MSCs) suffer from graphene aggregation issue in electrodes. It reduces the electrolyte ions transportation in the electrodes to degrade the charge storage ability of MSCs, hampering their practical application. Increasing the electrolyte ions transportation in the electrodes can boost the charge storage ability of MSCs. Herein, we design and experimentally realize pillar array structure of graphene electrodes for MSCs by direct ink writing technology. The graphene electrodes with pillar array structure increase the contact area with electrolyte and short the electrolyte ions transport path, facilitating electrolyte ions transport in electrodes. The MSCs exhibit high areal capacitance of 25.67 mF·cm⁻², high areal energy density of 20.54 µWh·cm⁻², and high power density of 1.45 mW·cm⁻². One single MSCs can power timer for 10 min and pressure sensor more than 160 min, showing high practical application possibility. This work provides a new avenue for developing high performance MSCs.

基于石墨烯的微型超级电容器（MSC）存在电极中石墨烯聚集问题。它减少了电极中电解质离子的传输，从而降低了 MSC 的电荷存储能力，阻碍了其实际应用。增加电极中电解质离子的传输可以提高 MSC 的电荷存储能力。在此，我们通过直接墨水写入技术设计并实验实现了MSC石墨烯电极的柱阵列结构。具有柱阵列结构的石墨烯电极增加了与电解质的接触面积并缩短了电解质离子的传输路径，有利于电解质离子在电极中的传输。 MSC表现出25.67 mF·cm ^{-2的高面积电容、20.54 µWh·cm -2}的高面积能量密度和1.45 mW·cm ^-2的高功率密度。单个MSC可为定时器供电10分钟，为压力传感器供电160分钟以上，具有很高的实际应用可能性。这项工作为开发高性能 MSC 提供了新途径。