Analysis of electrolyte of lithium air batteries

Source: 2020 - 03 - 29 15:03 hits: 1. Anhydrous electrolyte barrier requirements to meet conditions: isolation of CO2 and H2O in the air, prevent the reverberation LiOH and LiCO3, reverberation irreversible. The electrolyte ( At present more studies) Non-aqueous lithium air batteries mainly as conduction electrolyte ions and oxygen carrier, its function requirements to meet the following basic conditions: ( 1) In the process of charging and discharging, high stability. ( 2) High oxygen solubility, low oxygen solubility coefficient of viscosity) ; ( 3) Water absorption, low evaporation; ( 4) High ionic conductivity. ( 5) With appropriate contact Angle ( The electrolyte with carbon surface) 。 See the lithium ion battery electrolyte ( General research is still the EC: the main LiPF6 in DEC = 1:1) Other materials, such as GC ( Glass ceramic) Material and PC ( Polymer ceramic) Materials by a laminated woven membrane solid polymer electrolyte, litfsi - pmmitfsi - Silica - pvdf - HFP, etc. 2. Water electrolyte although nonaqueous electrolyte processing and negative reaction of lithium, but reaction product Li2O2 does not dissolve in the electrolyte, is gradually clogged pores, reduce the reaction interface area, prevent from loose to echo response interface, and then further inhibit the reaction, the practice ability of concrete is lower than its theoretical value, can also lead to bad circulation of lithium air batteries function poor results. Some scientists put forward the electrolysis of water. The theoretical density lower than anhydrous electrolyte, but in practice than anhydrous electrolyte for the time being. Electrolyte, electrolyte is commonly used in the experiment of LiOH and CH3COOH solution. The two together: positive electrode mainly consists of porous carbon data, catalyst and binder. In general, its positive should meet the following basic conditions: ( 1) Carbon data with sufficient high active surface area ( 2) Carbon data with proper standard of pore and porosity is high enough; ( 3) The catalyst for oxygen reduction has good catalytic activity; ( 4) Adhesive performance is good. Negative data research: lithium cathode protection film studies. In order to avoid reaction with oxygen and carbon dioxide generated by-products, may need more attention to water system, water electrolyte positive side - water Lithium more dangerous, but if used for future research, it is also a must request to face this problem.