Investigation on Electrochemical Properties of Low-Temperature Ionic Liquid-Based Electrolytes for MET Sensor

摘要

The molecular electronic transducer (MET) sensor that operates based on an electrochemical principle provides an alternative approach for motion sensing applications and seismic investigations. As the liquid state proof mass responds to detected seismic waves, the electroactive species, iodide and triiodide, are brought to the electrodes by the induced fluid motions. At the cathode, the triiodide reduction currents are generated correspondingly and serve as a record of the detected ground activities. Compared to the conventional motion sensor and seismometer with solid state mass-spring system, by utilizing a liquid state electrolyte as the proof mass, the MET sensor presents advantages such as installation angle independence, superior shock tolerance, low mass, and low power consumption. The abovementioned characteristics have made MET sensor an appealing candidate for seismic investigations in space explorations, especially on planetary objects with deployment challenges.