Xie Yanting, Zhang Haitao, Jiang Xinglin, Fan Letian, Huang Junfeng, Wang Wentao, Hu Haitao, He Zhengyou
Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China; Institute of Smart City and Intelligent Transportation, Southwest Jiaotong University, Chengdu 610031, China.
Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China; Institute of Smart City and Intelligent Transportation, Southwest Jiaotong University, Chengdu 610031, China; School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China.
J Colloid Interface Sci. 2025 Jan;677(Pt B):12-20. doi: 10.1016/j.jcis.2024.07.249. Epub 2024 Aug 8.
Asymmetric micro-supercapacitors (MSCs) exhibit higher energy density while face significant challenges in power density as well as cycling life and large dimensions. The key factors contributing to these dilemmas include the match of electrode materials and electrolytes, poor uniformity of device, and complicated while low-precise fabrication processes. Herein we develop a laser scribing-engraving (LSE) strategy to fabricate MSCs with monolithic high-voltage output and scalable array integration. Utilizing this strategy, we induce the conversion of the majority of TiCT-MXene into TiO and graphene oxide into laser-scribed graphene (LSG), yielding asymmetric MSCs with laser-induced MXene/graphene oxide as the negative electrode and MXene/graphene oxide as the positive electrode. A single asymmetric micro-supercapacitor exhibits a high voltage window of 1.8 V, delivering an outstanding energy density (240 mWh cm) and power density (9503 mW cm), coupled with excellent cycling stability. Moreover, the LSE strategy enables monolithically integrated 64 devices to achieve a high-voltage output of 115.2 V. Our approach showcases the potential for integrating micro-energy storage devices into various microsystems, increasing the practicality of asymmetric micro-supercapacitors.
非对称微型超级电容器（MSCs）虽然具有较高的能量密度，但在功率密度、循环寿命和尺寸较大方面面临重大挑战。导致这些困境的关键因素包括电极材料与电解质的匹配、器件均匀性差以及制造工艺复杂且精度低。在此，我们开发了一种激光刻划-雕刻（LSE）策略来制造具有单片高压输出和可扩展阵列集成的MSCs。利用这种策略，我们诱导大部分TiCT-MXene转化为TiO，氧化石墨烯转化为激光刻划石墨烯（LSG），从而得到以激光诱导MXene/氧化石墨烯为负极、MXene/氧化石墨烯为正极的非对称MSCs。单个非对称微型超级电容器具有1.8 V的高电压窗口，具有出色的能量密度（240 mWh cm）和功率密度（9503 mW cm），以及优异的循环稳定性。此外，LSE策略使64个器件单片集成，实现了115.2 V的高电压输出。我们的方法展示了将微能量存储器件集成到各种微系统中的潜力，提高了非对称微型超级电容器的实用性。
