Just Add a Drop of Water: A Paper Battery with Water Switch

A team of researchers at Empa developed a water-activated disposable paper battery. The researchers suggest that it could be used to power a wide range of low-power, single-use disposable electronics – such as smart labels for tracking objects, environmental sensors and medical diagnostic devices – and minimize their environmental impact. The proof-of-principle study has been published in the journal Scientific Reports. The battery, devised by Gustav Nyström and his team, is made of at least ...