Engineers use MoS2 nano "sandwich" to improve rechargeable batteries
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Author : Jenny Ruan
Update time : 2019-07-03 09:55:12
In the latest publication, Singer's team observed thatmolybdenum disulfideflakes store twice as much lithium or charge as the large amount of molybdenum disulfide reported in previous studies. The researchers also found that the high lithium capacity of these flakes does not last a long time and will fall after five charges, a behavior similar to a lithium-sulfur battery, which uses sulfur as one of its electrodes," Singer said. "It is well known that sulfur forms intermediate polysulfides dissolved in the battery organic electrolyte, causing volume fading.
We believe that the decrease in capacity in the molybdenum disulfide sheet is also due to the loss of sulfur in the electrolyte. In order to reduce the dissolution of the sulfur-based product into the electrolyte, the researchers wrapped the molybdenum disulfide sheet in a layer called silicon carbonitride. Or in the ceramic layer of SiCN. According to Singh, ceramics are high-temperature glass-like materials that are prepared by heating liquid silicon-based polymers and have higher chemical resistance to liquid electrolytes.
The silicon carbonitride-coated molybdenum disulfide sheet exhibits a stable cycle of lithium ions, whether the battery electrode is a conventional copper foil method or a self-supporting flexible paper in a bendable battery," Singer said after the reaction. The team also dissected and observed the cells under an electron microscope, which proves that silicon carbonitride can prevent mechanical and chemical degradation of liquid organic electrolytes, and Singer and his team now hope to better understand the molybdenum disulfide battery in everyday life. Performance in electronic devices - such as cell phones - can be charged hundreds of times. Researchers will continue to test molybdenum disulfide batteries during the charging cycle to analyze more data and better understand how to improve rechargeable batteries. Luoyang Trunnano Tech Co., Ltd (TRUNNANO) is a professional molybdenum disulfide manufacturer with over 12 years experience in chemical products research and development. If you are looking for high qualitymolybdenum disulfide, please feel free to contact us and send an inquiry.
