An ultrastretchable seamlessly integrated contactless charging microsystem towards skin-attachable wireless microelectronics
Zhihao Ren, Xiaoyu Shi, Qing Yang, Chunsheng Li, Hanqing Liu, Tiesheng Bai, Yuan Ma, Pratteek Das, Haofeng Liu, Endian Yang, Shengye Jin, Liang Feng, Quan Shi, Xinhe Bao, Hui–Ming Cheng, Zhong‐Shuai Wu
Abstract
For electronics to be wearable, contactless charging and overall deformability are necessary pre-conditions. However, the current heterogeneous integration based on different active materials and separate manufacturing often leads to mechanical mismatch. Here, we report an ultrastretchable all-in-one integrated MXene-based microsystem comprising wireless coils, micro-supercapacitors (MSCs) and strain sensors. The seamless configuration without any connecting interface dramatically improves the structural integrity of the microsystem, and a pre-crumpled structure endows it with superior stretchability. Attributed to these, our MSCs can be wirelessly charged in ~20 s under various types of deformation and are capable of powering strain sensors, responding rapidly to body motion signals. Moreover, the MSCs display a high specific capacitance of 76.82 F cm–3, and superb mechanical stability with 98.5% capacitance retention after biaxial stretching 1000 cycles from 0% to 500% areal strain. Therefore, this work sheds new insights into design and implementation of skin-attachable wireless microelectronics. The authors report a stretchable and integrated energy harvest-storage-application skin-adherent microsystem, by utilizing an all-in-one MXene film simultaneously as micro-supercapacitors, wireless receiver coils and strain sensors.