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edible battery

12.04.2023

Scientists continue to develop electronics that can safely monitor and heal our health inside the body. Unfortunately, powering these tiny medical gadgets isn't always easy.

Now there is a new type of battery that can help in this department. Made from completely edible substances, it can safely dissolve in the stomach, doing whatever it needs.

The prototype device, developed by molecular electronics experts at the Italian Institute of Technology, operates at a harmless voltage of 0,65 volts and delivers 48 microamps for 12 minutes, in the range needed to power tiny electronics.

Made from a varied list of ingredients, this is the first functional rechargeable battery to be served as a snack. Its ingredients include the vitamin riboflavin for the battery's anode (its "negative" end) and the addition of quercetin as the cathode ("positive" end). The electrolyte (which generates electrical charge) is made from a water-based solution, and the separator (which prevents short circuits) is made from burrow, seaweed found in sushi restaurants.

Activated charcoal, often used to treat poisoning, is included to increase electrical conductivity, while the outer contacts that transmit electricity to another device are made from beeswax combined with food-grade decorative gold.

The battery retains its charge for dozens of cycles, although it must be outside the case to charge. The prototype created here is roughly a square centimeter (0,155 square inches), but the team is already working on making it smaller.

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