Printable battery rolls off the presses

 作者:杜浈淦     |      日期:2019-03-06 05:16:19
By Will Knight A new type of low-power battery that does not require a case and is thin enough to be printed on paper will soon be making its debut in shops. The power source relies on an undisclosed mixture of chemicals to produce 20 milliamp-hours at a terminal voltage of 1.5 volts for every square centimetre that is printed. The battery material is roughly 0.5 millimetres thick and would, if mass-produced, cost just a few cents per square inch, according to Israeli-based company Power Paper. The new battery consists of three different layers. It has conventional zinc manganese-dioxide components as anode and cathode. Sandwiched in between, the cell’s chemical power source remains a closely guarded secret. Paper Power claims the material is non-toxic and non-corrosive, making the battery safe to use without casing. “We call it our Coca-Cola formula,” says Power Paper’s general manager Zohar Sagi. “Technically it will work like any other battery, but you can cut the battery into any size and shape for your product.” The battery will first be used to power flashing lights and jingles on novelty cards and other promotional products. The company’s Hong Kong subsidiary is currently manufacturing the first of these novelty items, which include greeting cards and mouse pads. Sagi believes that eventually the battery will be used to power electronic components built into smart labels and credit cards, allowing these tiny devices to store, display and transmit data. The battery could also be used within health care to power tiny medical diagnostic equipment and even drug delivery patches. A German healthcare company called KSW Microtech is already using the battery to power monitoring of the temperature of blood supplies. The company has fitted a small chip with a thermometer to the side of each blood bag that wirelessly transmits records of the bag’s temperature history to a nearby computer. John Irvine, of the Centre for Advanced Materials at the University of St Andrews, says that the battery could also be useful to electronics manufacturers, who could incorporate the power source into integrated circuits. Though the identity of the chemical power source has not been revealed, North Carolina State University chemistry researcher Saad Khan says there are a number of research groups working on polymer battery materials. But, he says,