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Multitasking MXene Inks Enable High‐Performance Printable Microelectrochemical Energy Storage Devices for All‐Flexible Self‐Powered Integrated Systems
Author(s) -
Zheng Shuanghao,
Wang Hui,
Das Pratteek,
Zhang Ying,
Cao Yuexian,
Ma Jiaxin,
Liu Shengzhong Frank,
Wu ZhongShuai
Publication year - 2021
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.202005449
Subject(s) - materials science , nanotechnology , supercapacitor , energy storage , human multitasking , electronics , flexible electronics , printed electronics , wearable technology , capacitance , inkwell , wearable computer , electrode , electrical engineering , computer science , embedded system , engineering , psychology , power (physics) , chemistry , physics , quantum mechanics , composite material , cognitive psychology
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 −2 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 −2 . 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.