Quasi-Solid-State Hybrid Electrolytes for Electrochemical Hydrogen Gas Sensor

Abstract

The quasi-solid-state hybrid electrolytes were synthesized by chemical cross-linking reaction of methacrylate-functionalized SiO 2 (MA-SiO 2) and tetra (ethylene glycol) diacrylate in aqueous electrolyte. A quasi-solid-state electrolyte synthesized by 6 wt.% MA-SiO 2 exhibited a high ionic conductivity of 177 mS cm-1 at room temperature. The electrochemical H 2 sensor assembled with quasi-solid-state electrolyte showed relatively fast response and high sensitivity for hydrogen gas at ambient temperature, and exhibited better durability and stability than the liquid electrolyte-based sensor. The simple construction of the sensor and its sensing characteristics make the quasi-solid-state hydrogen sensor promising for practical application.