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Let the children eat and eat food they will be happy to eat, but if accidentally swallowed a button cell battery, it will seriously burn the child's esophagus or digestive tract, while life-threatening. According to statistics, about 4,000 children attending emergency clinics in the United States each year are accidentally swallowed. There is currently no way to completely prevent children from swallowing batteries, but researchers have developed a new type of battery.
Weifeng Wang on November 7 news, researchers from the Massachusetts Institute of Technology in conjunction with Brigham and Women's Hospital of Massachusetts developed a new coating for button batteries - Quantum tunneling composite (QTC), Button cells coated with QTC coating will only conduct electricity when subjected to a certain pressure.
After the ordinary button battery enters the esophagus, the battery will conduct electricity after contact with water or saliva in the body. Under the promotion of the charge, the battery will react with the gastric juice to cause a chemical reaction to cause the battery to rupture, and the strong alkaline substance in the battery will be burned. Stomach and digestive tract, ranging from gastric perforation, if not removed in time will be serious to life-threatening. The button battery developed by MIT this time using QTC coating will only conduct electricity when subjected to certain pressure, and the pressure of the stomach and intestinal peristaltic pressure on the battery is insufficient to activate the discharge of the battery. QTC coating can Keep the button battery still in the intestine as an insulator.
It is reported that QTC is a rubber-like material, usually made of silicon, embedded with a metal particle structure. Normally, the metal particles are too far away to conduct current, but after being under a certain pressure, the metal particles are pushed together and the current is allowed to pass through so that the button battery is normally discharged.
The researchers said that QTC coatings are cheaper to produce and it should be easy to spread them widely. Industry insiders also gave support, arguing that this is a relatively simple solution and will not significantly increase costs. In addition to improving the safety of the battery, the QTC coating, because the coating is waterproof, can also increase the durability and other uses of the battery. The researchers stated that they will be tested on other types of batteries, including lithium batteries.
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