Abstract
Wearable and implant electronic devices have been widely utilized for healthcare and medicine. However, powering these devices for long duration with stable performance is extremely challenging. Here, we propose a body-based capacitive coupling and conductive channel power transfer (BC4PT) technology for this application. The BC4PT could unintentionally harvest the 50/60 Hz electricity using daily electronic devices. Large stray capacitances exist between electronic device such as phones and hand. When a person uses a plugged-in device, a high amount of 50/60 Hz electricity could be coupled to the hand, and transferred to wearable devices via the body conductive channel. The BC4PT could light up a 120 LEDs array directly, charge a 1mF capacitor to ∼ 23 V in 10 min. The harvested energy is utilized to power a wireless multivariable physiological sensor chip continuously or an implant device via the resonance-coupled wireless power transmission. The technology has a great application prospect for the self-powered wireless wearable and implant systems.
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