A New 0.4-MM-Thick 'Paper Battery' Can Power a Small Fan for 45 Minutes
Scientists from Nanyang Technology University (NTU) in Singapore developed paper-thin biodegradable zinc batteries, a press statement reveals. They believe the new material could sustainably power flexible wearable electronics of the future. The new zinc batteries are made up of electrodes that are screen-printed onto both sides of a sheet of hydrogel-reinforced cellulose paper.
https://interestingengineering.com/a-new-04-mm-thick-paper-battery-can-power-a-small-fan-for-45-minutes
