Stretchable and Self-Adhesive PEDOT:PSS/MXene Dry Electrode with Low Contact Impedance for ECG Monitoring

Abstract

Wearable dry electrodes are necessary for the long-term recording of human biopotential signals. However, current dry electrode may not fit the skin thoroughly, particularly when there is movement and sweat secretion which can lead to high interface impedance and poor signal quality. In this work, a stretchable dry electrode with low contact impedance and good self-adhesiveness has been prepared by solution processed conductive PEDOT:PSS, MXene, waterborne polyurethane (WPU) and fructose. The resultant dry electrode with excellent skin compliance shows much lower skin-contact impedance than the standard silver/silver chloride (Ag/AgCl) gel electrodes, and enables acquisition of high-quality electrocardiogram (ECG) signal under dry and wet skin conditions. The dry electrode shows promise in supporting application of ECG monitoring in daily scenarios.