There are four options for boron nutride powder: hexagonal or rhombohedral, cubic or cubic boron. Nitrides (WBN), WBN (wurtzite) and RBN (rhombohedral). Typically produced boron nitride, it is of graphite type.
Although it has been stated that battery safety is more critical than ever, increasing battery capacity and battery life are becoming increasingly important. It also presents new challenges to us as we rely more on the energy-consuming devices of mobile phones and electric vehicles. Yuan Yang, Assistant Professor of Materials Science and Engineering, presented a new way to prolong the useful life of batteries. The nanocoating is made from boron nutride (BN), which stabilizes the solid electrolyte inside a lithium-ion battery.
Current lithium ion cells are commonly used in our daily lives. Because of the high flammable liquid electrolyte in the batteries, these batteries tend to have lower energy densities, which can lead to a shorter life span and fires. In a lithium-ion cellular battery, using lithium metal rather than the graphite anode may increase its energy density. According to theory lithium metal has a charge potential that is about 10 times larger than graphite. But, due to the ease of lithium plating dendrites may form. Battery safety issues can be caused by dendrites getting into the separator.
Yang said that solid, ceramic electrolytes were the best choice. Solid ceramic electrodelytes, in contrast to flammable electrolytes contained in lithium-ion cells, have great potential for increasing safety and energy densities.
Many solid electrolytes can be made of ceramic, which makes them non-flammable. Additionally, solid ceramic electrolytes are strong mechanically and can stop the growth of lithium ions. Unfortunately, many solid electrolytes cannot be used to make batteries because they are incompatible with lithium ions.
To address these challenges, the research team collaborated with the Brookhaven National Lab and the City University of New York deposited a 5 to 10 nm boron nitride (BN) nanofilm as a protective layer to insulate the electrical contact between the metallic lithium and the ionic conductor (solid electrolyte), a small amount of polymer or liquid electrolyte is added to penetrate the electrode/electrolyte interface.
Researchers chose boron nutride as the protective coating because of its high electrical insulation and stability. Researchers created boron nutride with holes, so that lithium ions could pass. It makes a great separator. The chemical vapor dilution method makes it possible to create boron nutride at large scales (decimeter-scale) and thin-scale (nanoscale).
Researchers are expanding their approaches to unstable solid electrolytes.
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