A new disposable battery is made of paper and other sustainable materials and is activated with a few drops of water
Discarded electronics are piling up fast, pushing researchers to explore creative ways to reduce the resulting trash, known as e-waste. Now one team has crafted a water-activated disposable battery made of paper and other sustainable materials.
“It’s these small batteries that are big problems,” says Dele Ogunseitan, a public health professor at the University of California, Irvine, and a green technology researcher and adviser for major technology companies, who was not involved in the development of the paper battery. “Nobody really pays attention to where they end up.”
The new paper battery has the same key components as standard batteries but packages them differently. Like a typical chemical battery, it has a positively charged side called a cathode, a negatively charged side called an anode and a conductive material called an electrolyte between the two. A traditional battery’s components are encased in plastic and metal; in the new battery, the anode and cathode are inks printed onto the front and back of a piece of paper.
Although the researchers demonstrated that their battery could power an alarm clock, disposable paper batteries are unlikely to replace standard AAs on store shelves. Instead Nyström envisions a future where these batteries are embedded in diagnostic tests and environmental sensors, ideally with other sustainable components such as screens and packaging. That future may not be so far off.
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