It sounds impossible: Just add water to a piece of paper and get energy. Researchers at Empa, a Swiss research institute, devised a proof of concept for a water-activated disposable battery powered by ...

The paper battery achieves an open circuit voltage of 1.8 volts, a 1.0-volt current density of 100 mA/cm², and a maximum output of 103 milliwatts/cm². The battery is eco-friendly, using carbon ...

(Nanowerk News) Drawing inspiration from the way plants breathe, a group of researchers at Tohoku University has created a paper-based magnesium-air battery that can be used in GPS sensors or pulse ...