Pang Di, Alhabeb Mohamed, Mu Xinpeng, Dall'Agnese Yohan, Gogotsi Yury, Gao Yu
Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics , Jilin University , Changchun 130012 , PR China.
A.J. Drexel Nanomaterials Institute, Department of Materials Science and Engineering , Drexel University , Philadelphia , Pennsylvania 19104 , United States.
Nano Lett. 2019 Oct 9;19(10):7443-7448. doi: 10.1021/acs.nanolett.9b03147. Epub 2019 Sep 24.
Electrochemical actuators are devices that convert electrical energy into mechanical energy via electrochemical processes. They are used in soft robotics, artificial muscles, micropumps, sensors, and other fields. The design of flexible and stable electrode materials remains a major challenge. MXenes, an emerging family of 2D materials, have found applications in energy storage. Here, we report an actuator device using MXene (TiCT) as a flexible electrode material. The electrode in 1 M HSO electrolyte exhibits a curvature change up to 0.083 mm and strain of 0.29%. Meanwhile, the MXene-based actuator with a symmetric configuration separated by gel electrolyte (PVA-HSO) has curvature and strain changes up to 0.038 mm and 0.26% with excellent retention after 10,000 cycles. X-ray diffraction analysis demonstrates that the actuation mechanism is due to the expansion and shrinkage of the interlayer spacing of MXenes. This research shows promise of this new family of materials for electrochemical actuators.
电化学致动器是通过电化学过程将电能转化为机械能的装置。它们被用于软体机器人、人造肌肉、微型泵、传感器及其他领域。设计灵活且稳定的电极材料仍然是一项重大挑战。MXenes是一族新兴的二维材料，已在能量存储领域得到应用。在此，我们报道一种使用MXene（TiCT）作为柔性电极材料的致动器装置。在1 M HSO电解质中的电极展现出高达0.083 mm的曲率变化和0.29%的应变。同时，由凝胶电解质（PVA-HSO）隔开的具有对称结构的基于MXene的致动器，其曲率和应变变化分别高达0.038 mm和0.26%，在10000次循环后仍具有出色的保持率。X射线衍射分析表明，致动机理是由于MXenes层间距的膨胀和收缩。这项研究显示了这种新型材料家族在电化学致动器方面的应用前景。
