Details

Autor(en) / Beteiligte

• Guo, Jia-Yi
• Huang, Xiao
• Tian, Gui-Sen
• Lin, Zhi-Dong
• Chen, Zhe
• Du, Fei-Peng

Titel

LiCl-assisted polysiloxane electrolyte complexes for highly sensitive humidity sensing

Ist Teil von

• Sensors and actuators. B, Chemical, 2023-11, Vol.394, p.134472, Article 134472

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.