Wearable sensors with long cruising times without the need for an external wire-connected power supply are urgently required for a continuous physiological signal monitoring. Herein, we report the design and fabrication of a wearable all-in-one sensing system that integrates a sensitive strain sensor and a rechargeable zinc-air battery on the same laser-induced graphene (LIG) platform. The sensing electrode of the strain sensor, the catalytic air electrode of the zinc-air battery and the interconnection lines between the two are simultaneously fabricated through the same laser-scribing process on polyimide (PI) followed by pattern transfer to a flexible and stretchable polydimethylsiloxane (PDMS) substrate. In the sensor, the conductive porous LIG exhibits a high gauge factor (~2710.95), a wide detection range (~40%), and a well cyclic loading-unloading stability (>20,000 cycles). In the zinc-air battery, Co₃O₄ nanoparticles are in-situ laser-sintered on LIG to form an excellent electrode/electrolyte/air three-phased interfacing structure for a high catalytic performance, and a moisturized tetraethyl ammonium hydroxide (TEAOH)-KOH/polyvinyl alcohol (PVA) gel electrolyte tightly binds the Co₃O₄/LIG air electrode and zinc foil electrode together into an integrate thin-film energy device, which provides a high open-circuit voltage (~1.39 V) and a high specific capacity (712 mAh g⁻¹ at 0.2 mA cm⁻²). For a proof-of-concept, an intelligent wristband based on the sensing system was fabricated and worn on the wearer’s wrist for a long-time continuous pulse monitoring of up to 10 h. The health state of the wearer can be depicted upon the acquired pulse waveforms. The developed LIG-based sensing system with a high internal powering capability will be promising in wearable sensing applications.

对于连续生理信号监测，迫切需要具有长巡航时间且无需外部有线连接电源的可穿戴传感器。在此，我们报告了一种可穿戴一体化传感系统的设计和制造，该系统在同一激光诱导石墨烯 (LIG) 平台上集成了敏感应变传感器和可充电锌空气电池。应变传感器的传感电极、锌空气电池的催化空气电极和两者之间的互连线通过相同的激光划片工艺在聚酰亚胺 (PI) 上同时制造，然后将图案转移到柔性和可拉伸的聚二甲基硅氧烷上(PDMS) 基板。在传感器中，导电多孔 LIG 具有高规格系数 (~2710.95)、宽检测范围 (~40%)、以及良好的循环加载-卸载稳定性（>20,000 次循环）。在锌空气电池中，Co₃ O ₄纳米粒子在LIG上原位激光烧结形成具有高催化性能的优良电极/电解质/空气三相界面结构，以及润湿的四乙基氢氧化铵(TEAOH)-KOH/聚乙烯醇(PVA)凝胶电解质将 Co ₃ O ₄ /LIG 空气电极和锌箔电极紧密结合在一起，形成一个集成的薄膜能源装置，提供高开路电压 (~1.39 V) 和高比容量 (712 mAh g ^{- 1}在 0.2 mA cm ^-2）。为了进行概念验证，制造了基于传感系统的智能腕带，并将其佩戴在佩戴者的手腕上，以进行长达 10 小时的长时间连续脉搏监测。佩戴者的健康状况可以通过采集到的脉搏波形来描述。所开发的具有高内部供电能力的基于 LIG 的传感系统将在可穿戴传感应用中很有前景。