According to a recent report by physicists, American scientists have found a way to replace graphite with silicon sponge as a component in rechargeable lithium-ion batteries, thereby enabling the development of longer-lasting and more powerful batteries for commercial electronics. Equipment and electric cars. The study was published in the Journal of Materials Chemistry published this month by the American Chemical Society. The study was conducted by Rice University and Lockheed Martin, the leader of the research, Spartney Lisa Biswall, professor of chemical and biomolecular engineering at Rice University, and Manduri, a university scientist. · Sacker wrote that borrowing the process they developed, they can store objects that are four times heavier than themselves in lithium. Silicon is one of the most common elements on Earth and can replace graphite as the anode in batteries. Previously, the team found that porous silicon absorbs lithium more than 10 times more than graphite. This is because silicon absorbs lithium ions and then spreads. The sponge-like structure gives room for silicon to grow inside the battery without causing damage to the performance of the battery. In 2010, the team found that when silicon sponge had a small hole of 1 micron wide and 12 micrometers deep, it could make a big impact in the battery field, but the solid silicon base at that time could not absorb lithium and still needs improvement. In the latest research, scientists have discovered that the electrochemical etching process used to make these holes separates the sponge from the pedestal, which can then be reused to create more sponges. Researchers say at least four such sponges can be extracted from a standard 250 micron thick silicon wafer. Once it is extracted from the silicon wafer, it is opened up and down. By immersing it in a conductive polymer binder polyacrylonitrile (PAN), its conductivity is greatly enhanced. The scientist thus obtained a hard film that could be attached to a current collector and placed in the battery structure, and eventually used this process to create a lithium-ion battery with a discharge capacity of up to 1260 mA per gram. This makes it last longer. In the comparison, the researchers found that the initial discharge capacity of the battery was 757 mAh per gram before the film was used, but after the second charge and discharge cycle, the discharge capacity began to decrease rapidly and disappeared completely after 15 cycles. The processed film began to increase the discharge capacity after 4 cycles, and the porous silicon performed particularly well. After 20 cycles, the discharge capacity of the battery remained intact. At present, scientists are studying technologies that are expected to greatly increase the number of charge and discharge cycles in order to develop batteries that can be used for several years.
PVD is an innovative technology that can deposit very fine and thin metal films on products. Applied to stainless steel sinks, this technology ensures the durability and longevity of the product's color and helps maintain its beauty. Nano-coating makes the sink antibacterial, waterproof and oil resistant. We also support custom handmade sinks, so sinks can be customized to the size and color you need.
Nano Sink,Black Sink Kitchen,Nano Gold Sink,Nano Granite Sink
JIANGMEN MEIAO KITCHEN AND BATH CO.,LTD , https://www.jmmeiao.com