Pressure-Regulated Nanoconfined Channels for Highly Effective Mechanical-Electrical Conversion in Proton Battery-Type Self-Powered Pressure Sensor.

Battery-sensing based all-in-one pressure sensors are generally successfully constructed by mimicking the information transfer of living organisms and the sensing behavior of human skin, possessing features such as low energy consumption and detection of low/high-frequency mechanical signals. To design high-performance all-in-one pressure sensors, a deeper understanding of the intrinsic mechanisms of such sensors is required. Here, we proposed a mechanical-electrical conversion mechanism based on pressure-modulated nanoconfined channels. Then, the mechanism of ion accelerated transport in Graphene Oxide (GO) nanoconfined channels under pressure was revealed by Density Functional Theory calculation. Based on this mechanism, a proton battery-type self-powered pressure sensor MoO 3 /GO [CNF/Ca] /activated carbon (AC) was designed with an open-circuit voltage stabilization of 0.648 V, an ultrafast response/recovery time of 86.0 ms/93.0 ms, a pressure detection ranges of up to 60.0 kPa, and excellent static/dynamic pressure response. In addition, the one-piece device design enables self-supply, miniaturization, and charge/discharge reuse, and has potential applications in wearable electronics, health monitoring, and other fields. This article is protected by copyright. All rights reserved.