Sensors are being developed in our group based on various sensing mechanisms for wearable and printed sensor applications. Since many of the attributes of materials used for energy storage devices such as large surface area, fast ion and electronic transport, some of the materials developed for energy storage actually work well as sensor materials. Potentiostatic, conductivity-based, capacitance-based, and transistor based sensing devices are being investigated. The applications we are targeting include wearable medical sensors, environmental sensors, and gas sensors.