文献类型：期刊文献

英文题名：Flexible and Transparent Ionic Liquids/Poly(vinylidene fluoride) Composition-Gradient Piezo-Active Composites for Highly Sensitive Pressure Sensor

作者：Bao, Hao[1];Ma, Yizhou[2];Sun, Jiatai[1];Zhao, Qiuying[2];Yang, Lu[1];Hou, Ying[3];He, Haiyan[1];Huang, Huajie[1];Ji, Hongli[2];Qiu, Jinhao[2]

机构：[1]Hohai Univ, Coll Mech & Mat, Nanjing 210098, Peoples R China;[2]Nanjing Univ Aeronaut & Astronaut, State Key Lab Mech & Control Mech Struct, Coll Aerosp Engn, Nanjing 210016, Peoples R China;[3]East China Univ Sci & Technol, Sch phys, Shanghai 200237, Peoples R China

年份：2023

卷号：9

期号：2

外文期刊名：ADVANCED ELECTRONIC MATERIALS

收录：;EI(收录号：20224713147563);WOS:【SCI-EXPANDED(收录号:WOS:000888932100001)】；

基金：H.B. and Y.M. contributed equally to this work. This work was supported by National Natural Science Foundation of China (Nos. 51905149, 51875277, and 91963116), China Postdoctoral Research Funding (No. 2020M681473), and Jiangsu Planned Projects for Postdoctoral Research Funds (2020Z015).

语种：英文

外文关键词：composition gradient; ionic liquids; piezoelectric; poly(vinylidene fluoride) (PVDF); sensors

摘要：Nowadays, the advent of pressure sensors for intelligence terminal devices and skin-inspired electronics has trigged rapid development of flexible, sensitive, and transparent sensing materials. Piezo-active poly(vinylidene fluoride) (PVDF) is emerging as a promising candidate for sensing components due to the flexible and transparent features. However, the inherent weak piezo-activity and consequently low sensitivity of PVDF remains a challenge for its sensing applications. Herein, ionic liquids ([EMIM]Cl) additive combined with a composition-gradient multilayered architecture design are employed to hardness the piezo-response of PVDF. The resultant composites present ultra-high piezoelectric coefficient d(33) of 39 pC N-1, which is 2.78 times that of PVDF. Meanwhile, the transparent ILs dopant enables the composites with superior transparency (87%). With notable advantages of high transparency and piezoelectricity, the ILs/PVDF composites exhibit high sensitivity of 0.0423 V N-1, ultra-fast recovery time of 0.2 ms and stable operation capability when coupled with metal electrodes, confirming their applicability for reliable pressure sensor.