Abstract
Lithium ion capacitors with their high energy density, high power density and good cycle life can offer potential standalone energy storage solution when combined with renewable energy harvesting technologies to power wearable health sensor or Internet of things platform. In this study, we demonstrate fabrication of 13 Wh/L packaged Li-ion capacitor 2016 coincell prototype that can be charged using harvested solar energy from indoor lighting to power wearable health sensor platforms. The capacitor with its extremely low self-discharge rate, high load carrying capability and cycle life can provide significant advantages relative to rechargeable batteries of similar form factor. The study provides a comparison of performance of Li-ion rechargeable battery against the fabricated capacitor to continuously power wearable heath sensor platform.
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