Semi solid electrolyte can increase the safety of lithium sulfur batteries

Source: 2020 - 04 - 01 hits: hast times gable institute through a solid electrolyte to improve the safety of lithium sulfur batteries recently, the Singapore institute of science and technology laboratory ( NBL) Researchers plan developed for lithium sulfur batteries a half solid electrolyte, the electrolyte can be on the premise of not affect battery performance to improve the safety of the battery. Lithium sulfur batteries will be closer to become efficient power supply of various electronic and energy storage applications. For a long time, the security problem has prevented the industrial application of lithium ion batteries. Lithium ion batteries will be highly flammable liquid organic electrolyte leakage, depends on the thermal and mechanical instability on the electrode separator. Although the solid electrolyte has now been shown to improve the potential of lithium battery safety, but they often have mishandled, electrode/electrolyte ion conductivity is limited, leading to poor solid lithium battery performance. Jackie Y, NBL, director of the research team. , 'said professor should be a mixture of liquid and solid quasi solid electrolyte has now become a useful compromise, can not only achieve safer battery, and can keep good function. 'however, high resistance of solid element limit the function of the battery so far. In order to solve this problem, we to reprogram the microscopic structure of solids. Our solution eliminates the electrolyte leakage, and temperature and mechanical stability is very good. 'the NBL research team plans for a mixed solid electrolyte, is composed of liquid into the porous membrane, porous membrane by Li7La3Zr2O12 ( LLZO) Sheets. The team also developed a new method of manufacturing LLZO wafer, the wafer is used to construct the framework of the electrolyte. They call this method to create a 3 d film structure 'cupcake method. LLZO because of its high ion conductivity and excellent chemical and electrochemical stability and selected. Electrolyte of rigid structure to make it keep good contact with electrodes, and to prevent its cracking in the process of operation and battery assembly. This makes the battery safer and more practical. The NBL half solid electrolyte also is stable in wide voltage range, can be used for different lithium battery electrode materials, including high pressure of cathode. Adopting new NBL electrolyte preparation of lithium battery has the advantages of large capacity, fast charge and discharge. In the experiment in 1. 5 mg/cm2 load density, the rate of new electrolyte obtained obvious capacity ( Respectively is 1 ℃ ~ 515 ℃ and 2 c ~ 340 mAh/g) 。 This is a lithium - Mixed quasi solid sulfur battery can realize one of the highest function. Should the professor said: 'we found that the 3 d structure is crucial for the best performance of the battery. In addition, our system shows good stability in polar temperatures. These results demonstrate that our chip structure as other semi-solid framework the great potential of lithium battery. At present, the team is developing new NBL lithium ion, lithium solid sulfur and lithium batteries used in commercial.