Non-toxic hydrogel (from mimosa seed)-based bio-piezoelectric nanogenerator/ highly-efficient self-charging supercapacitor device

https://techxplore.com/news/2025-04-mimosa-seed-bio-piezoelectric-device.html#google_vignette

"harvests mechanical energy (finger pressure)... supercapacitor's electrodes RGO/NiZTO-based, stores nanogenerator harvested energy ... ~13.5 V, ~2.98 μA piezoelectric output... bio-hydrogel exhibits 24 pC/N piezoelectric coefficient, 40.2% energy conversion efficiency... retains 87.5% of capacitance after 6K cycles, 125.4 Wh/kg energy density at 1200 W/kg power density... future: make less susceptible to biodegradation, enhance its piezoelectric response, scalability... medical implants/ sensors, wearables, robots, IoT"

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Soil fungus forms durable hydrogels with potential for biomedical materials

https://phys.org/news/2025-10-soil-fungus-durable-hydrogels-potential.html

Flexible evaporation-induced generator for wearable power generation

https://www.eurekalert.org/news-releases/1106608