Ion gradient induced self-powered flexible strain sensor

作者全名：Huang, Qi; Jiang, Yadong; Duan, Zaihua; Wu, Yuanming; Yuan, Zhen; Guo, Jinhong; Zhang, Mingxiang; Tai, Huiling

作者地址：[Huang, Qi; Jiang, Yadong; Duan, Zaihua; Wu, Yuanming; Yuan, Zhen; Zhang, Mingxiang; Tai, Huiling] Univ Elect Sci & Technol China UESTC, Sch Optoelect Sci & Engn, State Key Lab Elect Thin Films & Integrated Device, Chengdu 610054, Peoples R China; [Guo, Jinhong] Chongqing Med Univ, Coll Lab Med, MOE Key Lab Lab Med Diag, 1 Yixueyuan Rd, Chongqing 400016, Peoples R China

通信作者：Duan, ZH; Tai, HL (通讯作者)，Univ Elect Sci & Technol China UESTC, Sch Optoelect Sci & Engn, State Key Lab Elect Thin Films & Integrated Device, Chengdu 610054, Peoples R China.; Guo, JH (通讯作者)，Chongqing Med Univ, Coll Lab Med, MOE Key Lab Lab Med Diag, 1 Yixueyuan Rd, Chongqing 400016, Peoples R China.

来源：NANO ENERGY

ESI学科分类：MATERIALS SCIENCE

WOS号：WOS:001238081700001

JCR分区：Q1

影响因子：16.8

年份：2024

卷号：126

期号：　

开始页：　

结束页：　

文献类型：Article

关键词：Ion gradient; Self -powered; Strain sensor; Flexible sensor; Respiratory monitoring

摘要：To cope with energy hazards and reduce frequent battery replacement of strain sensors, various self-powered flexible strain sensors (including piezoelectric, triboelectric and electrochemical types) have developed recent years. However, the piezoelectric and triboelectric strain sensors cannot monitor static strain, and electrochemical strain sensors face the problem of performance degradation. Herein, inspired by ion gradient generators, a self-powered flexible strain sensor based on strain regulated ion gradient strategy is constructed. The sensor consists of elastic yarn coated with carbon nanotubes (CNTs), LiCl-filter paper (FP) and latex tube encapsulation. LiCl-FP with excellent water molecules absorption performance is wrapped on one side of the elastic yarn, forming a high humidity region in the sensor. The part of the elastic yarn that is not covered by LiClFP has weak water molecules absorption performance, forming a low humidity region in the sensor. The ions in the sensor move directionally from the high humidity region to the low humidity region, forming an ion gradient and generating voltage/current. The test results indicate that the sensor exhibits a wide strain detection range (0.5%-100%) and good repeatability (1000 times). The strain sensing mechanism can be attributed to the strain regulated ion gradient and the resistance strain effect. In addition, the strain sensing function of the sensor is verified by monitoring respiration. This work opens a new avenue for development of self-powered strain sensor using strain regulated ion gradient.

基金机构：National Science Fund for Distinguished Young Scholars [62225106]; Natural Science Foundation of China [62301114, 62101105]; Natural Science Foundation of Sichuan Province [24NSFSC5807]; Sichuan Province Hong Kong, Macao and Taiwan Science and Technology Innovation Cooperation Project [2023YFH0091]

基金资助正文：This work is supported by the National Science Fund for Distinguished Young Scholars (Grant No. 62225106) , Natural Science Foundation of China (Grant No. 62301114 and 62101105) , Natural Science Foundation of Sichuan Province (No. 24NSFSC5807) and Sichuan Province Hong Kong, Macao and Taiwan Science and Technology Innovation Cooperation Project (Grant No. 2023YFH0091) .