Amperometric Hydrogen Sensor Based on Solid Polymer Electrolyte and Titanium Foam Electrode

Abstract

Trace hydrogen detection plays an important role in the safety detection of lithium-ion batteries (LIBs) due to the generation and leakage of trace hydrogen in the early stage of LIBs damage. In this work, an amperometric hydrogen sensor based on solid polymer electrolyte was reported. The sandwich device structure was realized, which could directly diffuse the gas from both sides to the three-phase interface (gas/electrode/electrolyte) to participate in the reaction through the optimal design of the gas diffusion path. Then, platinum nanoparticles (Pt-NPs) were loaded on the metal foam by electroplating, and the porous electrode was filled with solid polymer electrolyte. A sensor with high specific surface area, high catalytic activity, and high sensitivity was obtained. Finally, the hydrogen oxidation reaction (HOR) mechanism of the platinum-loaded (Pt-loaded) titanium foam (Ti foam) electrode under both anaerobic and aerobic conditions was verified, and the properties of the sensor was evaluated. The hydrogen sensor with a “sandwich” structure has the advantages of high sensitivity, good stability, low detection limit and low cost, which provides a technical solution for the safety and real-time monitoring of LIBs.

Gel polymer electrolyte-based dual screen-printed electrodes for the headspace quantification of 4-ethylphenol and ethanethiol simultaneously in wines

“…As it has been described at the bibliography, the typical aqueous supporting electrolyte can be replaced by low-volatility materials, such as Nafion [ 23 ] or room temperature ionic liquids (RTILs) [ 24 , 25 ]. Up to now, diverse approaches have been attempted for the implementation of solid supporting electrolytes onto electrochemical devices, ranging from the use of direct Nafion [ 23 ], RTIL [ 26 ] or RTIL/ethanol mixtures [ 27 ] drop-casted onto the sensor surface, RTILs dried at 60 °C for 1 day [ 28 ], to blends of RTILs, poly(vinylidene fluoride) (PVDF), and organic solvents such as 1-methyl-2-pyrrolidone (NMP) [ 29 ] or N,N-dimethylformamyde (DMF) [ 30 , 31 ]. In this work, the performance of the simultaneous headspace amperometric quantification of 4-ethylphenol and ethanethiol, associated to important organoleptic defects, has been studied using AC 60 and CoPh-modified dual SPCEs coated with different solid-state supporting electrolytes.…”

Hydrogen sensors operated in oxygen-free environments

“…Considering these requirements and the current technological limitations, it is evident that there is an urgent need for new methods of monitoring H 2 gas in oxygen-free environments, which is a new avenue in the field of gas sensors. Until now, several types of H 2 sensors have been developed and operate successfully in oxygen-free environments, such as chemiresistive-based, [6][7][8][9][10][11][12][13][14][15] Schottky diodebased, [16][17][18][19][20][21][22] electrochemical-based, [22][23][24][25] acoustic-based [26][27][28][29] and optical-based, [4,[30][31][32][33] , as demonstrated in Fig. 1.…”