High-Porosity Foam-Based Iontronic Pressure Sensor with Superhigh Sensitivity of 9280 kPa^(-1)

作     者：Qingxian Liu Yuan Liu Junli Shi Zhiguang Liu Quan Wang Chuan Fei Guo Qingxian Liu;Yuan Liu;Junli Shi;Zhiguang Liu;Quan Wang;Chuan Fei Guo

作者机构：School of AstronauticsHarbin Institute of TechnologyHarbin 150001HeilongjiangPeople’s Republic of China Department of Materials Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055People’s Republic of China Department of Mechanics and Aerospace EngineeringSouthern University of Science and TechnologyShenzhen 518055GuangdongPeople’s Republic of China Department of Civil and Environmental EngineeringShantou UniversityShantou 515063GuangdongPeople’s Republic of China Department of Mechanical EngineeringMassachusetts Institute of TechnologyCambridgeMA 02139USA Department of Physics and TcSUHUniversity of HoustonHoustonTX 77204USA Guangdong Provincial Key Laboratory of Functional Oxide Materials and DevicesSouthern University of Science and TechnologyShenzhen 518055GuangdongPeople’s Republic of China Present Address:320 Crescent Village Circle Unit 1413San JoseCA 95134USA 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2022年第14卷第2期

页      面：12-23页

核心收录：

学科分类：080202[工学-机械电子工程] 08[工学] 0802[工学-机械工程] 

基　　金：This work was financially supported by the funds of the National Natural Science Foundation of China(No.51903118 and U1613204) the Science Technology the Shenzhen Sci-Tech Fund(No.KYTDPT20181011104007) M.G.also thanks the support of“College Student’s Innovation and Entrepreneurship Program”(No.2018X33).Guangdong Provincial Key Laboratory Program(2021B1212040001)from the Department of Science and Technology of Guangdong Province the“Guangdong Innovative and Entrepreneurial Research Team Program”under contract no.2016ZT06G587 the“Science Technology and Innovation Committee of Shenzhen Municipality”(Grant No.JCYJ20170817111714314) 

主　　题：High porosity Elastic modulus Compression deformation Iontronic pressure sensor Superhigh sensitivity 

摘      要：Flexible pressure sensors with high sensitivity are desired in the fields of electronic skins,human-machine interfaces,and health *** ionic soft materials with microstructured architectures in the functional layer is an effective way that can enhance the amplitude of capacitance signal due to generated electron double layer and thus improve the sensitivity of capacitive-type pressure ***,the requirement of specific apparatus and the complex fabrication process to build such microstructures lead to high cost and low ***,we report a simple strategy that uses open-cell polyurethane foams with high porosity as a continuous three-dimensional network skeleton to load with ionic liquid in a one-step soak process,serving as the ionic layer in iontronic pressure *** high porosity(95.4%) of PU-IL composite foam shows a pretty low Young s modulus of 3.4 kPa and good compressibility.A superhigh maximum sensitivity of 9,280 kPa^(-1) in the pressure regime and a high pressure resolution of 0.125% are observed in this foam-based pressure *** device also exhibits remarkable mechanical stability over 5,000 compression-release or bending-release *** high porosity of composite structure provides a simple,cost-effective and scalable way to fabricate super sensitive pressure sensor,which has prominent capability in applications of water wave detection,underwater vibration sensing,and mechanical fault monitoring.