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Engineers use MoS2 nano sandwich to improve rechargeable batteries

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Singer's research team discovered that the high lithium capacity of these flakes does not last long and will fall after five charges, a behavior similar to a lithium-sulfur battery which uses sulfur as one electrode. Singer added that they also discovered the high capacity lithium of these flakes doesn't last for long, and it will drop after five charges. "This behavior is similar with a lithium-sulfur cell, which uses sulfur in one of its electrodes," Singer stated. "It's well-known that sulfur dissolves in the organic electrolyte of the battery to form intermediate polysulfides which causes volume fading.

We believe the loss of sulfur from the electrolyte is responsible for the reduction in capacity. Researchers wrapped the molybdenum-disulfide sheet with a layer of silicon carbonitride to reduce dissolution. Or in a ceramic layer of SiCN. Singh says that ceramics are glass-like high-temperature materials prepared by heating silicon-based liquid polymers. They have a higher chemical resistance than liquid electrolytes.


Singer explained the results after the experiment. The team examined the cells using an electron microscope. This proved that silicon carbitride prevents mechanical and chemical degradation in liquid organic electrolytes. Singer's team hopes to now better understand molybdenum diulfide batteries. Electronic devices, such as cell phones, can be recharged many times. Researchers will continue to test the molybdenum diulfide battery during the charging cycle in order to analyze and better understand rechargeable Batteries.

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