Cellular Carbon Film-based Flexible Sensor and Waterproof Supercapacitors

A highly sensitive portable piezoresistive sensor with a fast response-time in an extended linear working range is urgently needed to meet the rapid development of the artificial intelligence (AI), interactive human–machine interface and ubiquitous flexible-electronics. However, it is a challenge to rationally couple these figure-of-merits (sensitivity, response-time, and working range) together as they typically show functionally correlative behavior in sensor. Here, we aim at introducing the hierarchical pores across several size orders from micro to larger scale into the intrinsically flexible graphene-based electrode materials that overcome this limitation of the sensor. We achieved a flexible sensor with prominent sensitivity of 11.9 kPa-1 in the linear range of 3 Pa to ~21 kPa and a rapid response-time of 20 ms to positively monitor the pulse rate, voice recognition and true force value for biomedical and interactive human–machine interface application assisted with an analog-digital converter (ADC)...