Ultrahigh-Sensitivity Pressure Sensor With Graphene Aerogel Electrodes

A new pressure sensor with ultrahigh sensitivity is presented. The sensor is based on the concept of creating a variable supercapacitor that responds to pressure. The sensor consists mainly of a liquid electrolyte and two graphene aerogel electrodes. As pressure is applied to the graphene aerogel electrodes, the liquid electrolyte penetrates in the pores of the electrodes, and a variable supercapacitor is obtained. The sensor is sensitive to pressures of less than 0.1 Pa. Characteristics of the sensor, such as accuracy, nonlinearity, and response time, are fully analyzed.