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Robust Polymeric Ionic Liquid/Ionic Liquid Solid-State Electrolyte Membrane for Miniaturized and High-Performance

Zhuoru Huang¹, Yuzi Zeng¹, Shiqi Tu¹

¹Biosensor National Special Laboratory, Key Laboratory for Biomedical Engineering of Ministry of Education, Department of Biomedical Engineering, Zhejiang University, Hangzhou 310027, China.

|March 11, 2026

Summary

This study developed a solid-state electrolyte using polymeric ionic liquid (PIL) and ionic liquid (IL) for advanced electrochemical gas sensors. This innovation enhances sensor stability and performance for applications like hydrogen detection.

Keywords:

electrochemical gas sensor ionic liquid polymeric ionic liquid porous substrate solid-state electrolyte

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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Published on: December 20, 2016

Area of Science:

Electrochemistry
Materials Science
Sensor Technology

Background:

Room-temperature ionic liquids (RTILs) offer advantages for electrochemical gas sensors but suffer from fluidity issues impacting device stability.
Conventional polymer electrolytes often lack the desired ionic conductivity and electrochemical performance for high-demand applications.

Purpose of the Study:

To develop a stable, high-performance solid-state electrolyte for miniaturized electrochemical gas sensors.
To overcome the limitations of fluid RTILs in device packaging and long-term operational stability.
To investigate the efficacy of a novel polymeric ionic liquid (PIL)/ionic liquid (IL) hybrid electrolyte.

Main Methods:

Incorporation of PIL into IL to form a solid, robust membrane electrolyte.
Implementation of the PIL/IL electrolyte on screen-printed electrodes and flexible porous substrates.
Characterization of sensor performance using hydrogen as the target analyte, evaluating sensitivity, stability, and response time.

Main Results:

The PIL/IL hybrid electrolyte demonstrated superior ionic conductivity, thermal stability, and electrochemical performance compared to conventional polymer electrolytes.
Sensors fabricated with the PIL/IL electrolyte exhibited excellent sensitivity, stability, and rapid response times for hydrogen detection at room temperature.
The developed solid-state electrolyte and electrode architecture proved scalable and easy to fabricate.

Conclusions:

A novel solid-state electrolyte based on PIL/IL successfully addresses the limitations of fluid RTILs in electrochemical gas sensors.
The developed strategy enables the creation of high-performance, miniaturized, and stable electrochemical gas sensors with broad applicability.
This work presents a scalable and practical approach for fabricating advanced gas sensing devices.