LiCl-assisted polysiloxane electrolyte complexes for highly sensitive humidity sensing

Polyelectrolytes with hydrophilic and hydrophobic structures are widely employed in humidity sensors, but their response properties necessitate improvement. This paper introduces the development of crosslinked polysiloxane electrolytes via Zr4+ coordination and LiCl assistance for humidity sensing a...

Full description

Saved in:
Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2023-11, Vol.394, p.134472, Article 134472
Main Authors: Guo, Jia-Yi, Huang, Xiao, Tian, Gui-Sen, Lin, Zhi-Dong, Chen, Zhe, Du, Fei-Peng
Format: Article
Language:English
Subjects:
Complexes
Humidity response
Microstructure
Polysiloxane polyelectrolyte
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Polyelectrolytes with hydrophilic and hydrophobic structures are widely employed in humidity sensors, but their response properties necessitate improvement. This paper introduces the development of crosslinked polysiloxane electrolytes via Zr4+ coordination and LiCl assistance for humidity sensing applications. The composition, microstructure, thermal stability, and humidity response of polymer complexes based on ZrOCl2 were thoroughly investigated. The resulting complexes exhibited porous structures and demonstrated excellent thermal stability. The ionic conductivity displayed an exponential change of 106 - 107 within the relative humidity (RH) range of 43–95 %. The polymer complexes with 5 mol% ZrOCl2 exhibited the most favorable humidity sensing properties, including a response time of 90 s and a recovery time of 7 s. The addition of LiCl as an assistant further enhanced the humidity sensing properties of the polymer complexes. The optimal sensor exhibited high sensitivity, reaching 1175 throughout the entire RH range from 11 % to 95 %. It demonstrated good linearity, minimal humidity hysteresis (2.3 % RH), and rapid response/recovery time of 16/9 s. The development of LiCl-assisted polysiloxane polyelectrolyte-Zr complexes has provided a strategy for the creation of high-performance humidity sensors. ●The introduction of Zr4+ and Li+ impacts the structure of polysiloxane electrolyte.●High moisture sensitivity of polysiloxane electrolyte complexes after coordination.●Low response/recovery time and hysteresis for LiCl-assisted polysiloxane complexes.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2023.134472