Zhang Qixiang, Lei Dandan, Shi Junjie, Ren Ziqi, Yin Jianyu, Jia Peixue, Lu Wenzhong, Gao Yihua, Liu Nishuang
School of Physics, Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology, Wuhan, 430074, P. R. China.
Adv Mater. 2023 Dec;35(52):e2308795. doi: 10.1002/adma.202308795. Epub 2023 Nov 22.
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, a mechanical-electrical conversion mechanism based on pressure-modulated nanoconfined channels is proposed. Then, the mechanism of ion accelerated transport in graphene oxide (GO) nanoconfined channels under pressure is revealed by density functional theory (DFT) calculation. Based on this mechanism, a proton battery-type self-powered pressure sensor MoO /GO /activated carbon (AC) is designed with an open-circuit voltage stabilization of 0.648 V, an ultrafast response/recovery time of 86.0 ms/93.0 ms, 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, showing application potential in wearable electronics, health monitoring, and other fields.
基于电池传感的一体化压力传感器通常通过模仿生物体的信息传递和人类皮肤的传感行为成功构建，具有低能耗以及能检测低频/高频机械信号等特点。为了设计高性能的一体化压力传感器，需要更深入地了解此类传感器的内在机制。在此，提出了一种基于压力调制纳米受限通道的机电转换机制。然后，通过密度泛函理论（DFT）计算揭示了压力作用下氧化石墨烯（GO）纳米受限通道中离子加速传输的机制。基于该机制，设计了一种质子电池型自供电压力传感器MoO /GO /活性炭（AC），其开路电压稳定在0.648 V，具有86.0 ms/93.0 ms的超快响应/恢复时间,压力检测范围高达60.0 kPa，并且具有出色的静态/动态压力响应。此外，一体式器件设计实现了自供电、小型化以及充放电复用，在可穿戴电子设备、健康监测等领域展现出应用潜力。
