Zheng Shuanghao, Wang Hui, Das Pratteek, Zhang Ying, Cao Yuexian, Ma Jiaxin, Liu Shengzhong Frank, Wu Zhong-Shuai
State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China.
Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China.
Adv Mater. 2021 Mar;33(10):e2005449. doi: 10.1002/adma.202005449. Epub 2021 Feb 1.
The future of mankind holds great promise for things like the Internet of Things, personal health monitoring systems, and smart cities. To achieve this ambitious goal, it is imperative for electronics to be wearable, environmentally sustainable, and safe. However, large-scale manufacture of self-sufficient electronic systems by exploiting multifunctional materials still faces significant hurdles. Herein, multitasking aqueous printable MXene inks are reported as an additive-free high-capacitance electrode, sensitive pressure-sensing material, highly conducting current collector, metal-free interconnector, and conductive binder. By directly screen printing MXene inks, MXene-based micro-supercapacitors (MSCs) and lithium-ion microbatteries (LIMBs) are delicately fabricated on various substrates. The as-prepared MSCs exhibit ultrahigh areal capacitance of 1.1 F cm and the serially connected MSCs offer a record voltage of 60 V. The quasi-solid-state LIMBs deliver a robust areal energy density of 154 μWh cm . Furthermore, an all-flexible self-powered integrated system on a single substrate based on the multitasking MXene inks is demonstrated through seamless integration of a tandem solar cell, the LIMB, and an MXene hydrogel pressure sensor. Notably, this integrated system is exceptionally sensitive to body movements with a fast response time of 35 ms. Therefore, this multipurpose MXene ink opens a new avenue for powering future smart appliances.
人类的未来在物联网、个人健康监测系统和智能城市等方面有着广阔前景。为实现这一宏伟目标，电子产品必须具备可穿戴、环境可持续且安全的特性。然而，利用多功能材料大规模制造自给自足的电子系统仍面临重大障碍。在此，报告了一种多任务水性可印刷的MXene墨水，它可作为无添加剂的高电容电极、灵敏的压力传感材料、高导电性集流体、无金属互连器和导电粘合剂。通过直接丝网印刷MXene墨水，可在各种基板上精心制造基于MXene的微型超级电容器（MSC）和锂离子微型电池（LIMB）。所制备的MSC表现出1.1 F/cm²的超高面积电容，串联连接的MSC提供了创纪录的60 V电压。准固态LIMB具有154 μWh/cm²的强大面积能量密度。此外，通过串联太阳能电池、LIMB和MXene水凝胶压力传感器的无缝集成，展示了基于多任务MXene墨水的单基板上的全柔性自供电集成系统。值得注意 的是，该集成系统对身体运动异常敏感，响应时间快至35毫秒。因此，这种多功能MXene墨水为未来智能电器的供电开辟了一条新途径。
