材料科学
碳纳米管
执行机构
电极
离子键合
弯曲
导电体
纳米片
化学工程
纳米技术
复合材料
离子
有机化学
电气工程
工程类
物理化学
化学
作者
Yue Wu,Yixiang Shi,Yingyi Wang,Yongfeng Wang,Lian-Hui Li,Simin Feng,Lin Liu,Lili Li,Tie Li,Ting Zhang
标识
DOI:10.1002/admt.202200258
摘要
Abstract Conductive metal–organic frameworks (MOFs) have recently been applied in electroactive ionic actuators due to their high surface areas and fast ion migration. However, their actuation performance needs to be promoted in terms of high conversion efficiency and large strain. Here, a soft ionic actuator is assembled by designing a hierarchical Cu‐MOFs‐based active material, which is composed of conductive Cu‐catecholate (Cu‐CAT) nanosheets covalently bridged by carboxylic multiwall carbon nanotubes (Cu‐CAT@MWCNT). Benefited from the large electromechanical deformation and rapid response rate of the Cu‐CAT@MWCNT electrodes, the assembled soft actuator exhibits large displacement of 16.6 mm with high bending strain of 0.52% (AC of ±3 V) and a high energy conversion efficiency (3.02%) with cycling stability over 10 000 cycles (in frequency range of 0.1–10 Hz). In addition, it demonstrates the capacity of gripping objects when assembled on a robot. The Cu‐CAT@MWCNT hybrid material‐based electrode points out a feasible pathway to construct soft actuators with improved performance and broadens their applications.
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