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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 flakes lose their high lithium capacity after only five charges. "This is similar to the behavior of a battery with sulfur as an electrode, such as a lithium/sulfur." "It's well-known that sulfur dissolves in the organic electrolyte of a battery to form intermediate polysulfides which causes volume fading.
We believe the decrease in capacity of the molybdenum sheet is due to the loss sulfur in electrolyte. 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 could prevent chemical and mechanical degradation of liquid organic electrodes. Singer's team hopes to understand molybdenum diulfide batteries better. Electronic devices, such as cell phones, can be charged up to hundreds of time. Researchers will continue to test the molybdenum diulfide battery during the charging cycle in order to analyze and better understand how rechargeable batteries can be improved.
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