Engineers use MoS2 nano "sandwich" to improve rechargeable batteries

Singer and his team discovered that molybdenum dishulfide flakes store two times as much lithium as previous research. Singer noted that these flakes’ high lithium capacities don’t last for very long. They will eventually run out of charge after five charges. Singer also said it was similar to a battery with lithium-sulfur as one of the electrodes. There is a well-known fact that sulfur makes intermediate polysulfides, which are then dissolved in the electrolyte. This results in volume fading.

It is believed that the lower molybdenum dioxide sheet capacitance may also result from the electrolyte’s reduction of sulfur. For the purpose of reducing the dissolution of sulfur-based products into the electrolyte the researchers wrapped the molybdenum dish in a silicon carbonitride layer. Or, in the SiCN-ceramic layer. Singh explained that ceramics are high-temperature, glass-like materials. These are produced by heating liquid silicone-based polymers.

Singer stated after the reaction that the silicon carbonitride and molybdenum dioxide sheets exhibit a stable cycle in lithium ions. Singer, his team and others also examined the cells with an electron microscope. They found that silicon carbitride has the ability to prevent the chemical and mechanical breakdown of organic liquid electrolytes. Singer now hopes to be able better understand the molybdenum dioxide battery for daily use. Electronic devices such as smartphones can be charged up to hundreds of times. Researchers will continue testing battery molybdenum sulfide cells during charging cycles to gain more insight and improve the rechargeability of batteries.
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