Ingestible paper battery for medical devices
Researchers have developed a thin, ingestible paper-based battery capable of powering medical devices inside the body for up to three days before gradually degrading. The battery consists of thin layers, including a magnesium alloy as the anode, molybdenum trioxide and activated carbon as the cathode, with a biodegradable electrolyte, covered by a beeswax layer to slow down degradation within the acidic environment of the gastrointestinal tract. Experiments on pigs demonstrated that the new battery could power medical devices such as RFID chips for monitoring medication and stimulating the stomach, with the voltage gradually decreasing over time and no obvious tissue damage. The technology is in its early stages, with researchers working on improving manufacturing and controlling the operational duration, and plans to conduct initial clinical trials within the next two years.
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