Waste masks become batteries with energy density close to lithium-ion batteries

2022-04-30 0 By

Now, Russian scientists have developed a low-cost and efficient battery that is closer to the energy density of lithium-ion batteries commonly used today.Mask is one of the most powerful weapon to resist bacteria, virus, effectively reduce the droplet infection opportunity between people, but when the masks are breathing or sweat wet effect will reduce, masks for one-time use, more COVID – 19 there is, under the background of large environmental costs, 2020 study suggests that early outbreaks per month to use up to 129 billion masks,They end up in incinerators, landfills or carelessly dumped in the wild.The Moscow State Institute of Steel and Alloy (MISiS) is trying to bring old masks and other discarded medical supplies back to life.First, given that masks are medical supplies for epidemic prevention, the team sterilized them completely with ultrasound, then soaked them in graphene ink, compressed and heated to 140°C to form conductive particles that act as battery electrodes.Conventional ultracapacitor batteries typically rely on ultra-high temperatures to thermal crack and carbonate, requiring temperatures as high as 1,000 to 1,300 °C and using up to 10 times more energy than the new technology, the team notes.Many of the new batteries are made from discarded medical supplies, including isolation membranes made from discarded masks and protective cases made from drug packaging.The team also noted that the results were surprisingly good, with an energy density of 99.7 Watt-hours (Wh/kg) per kilogram, very close to the 100 to 265 Wh/kg of lithium-ion batteries.Subsequently, calcium cobalt oxide inorganic perovskite nanoparticles were added to the electrode to increase the energy density. The energy density jumped twice to 208 Wh/kg, maintaining 82% capacity after 1,500 charge-discharge cycles and providing power for more than 10 hours at 0.54 V.The team believes that using waste masks could significantly reduce the cost of materials, as well as make thin, flexible batteries, which they hope to use in electric vehicles, solar energy and other applications.While the question of how to collect waste masks remains, the Russian team’s idea does give them a potential home beyond trash cans, and in the past, RMIT University in Australia has found that waste masks can be made into stronger road materials.It can effectively improve the ductility and flexibility of recycled concrete aggregate (RCA).(First image: Pixabay)