Solid state battery electrolyte technology development status and trends

Source: 2020 - 03 - 23 14:02 hits: time situation and development trend of the technology of solid state electrolyte battery: why do you want to study the solid-state batteries? At present, on the basis of the liquid electrolyte of lithium ion batteries in electric vehicles and intelligent electronic products in areas such as getting more and more difficult to meet customer's requirement for long life. Therefore, the researchers will lithium as negative and sulfur, air ( Oxygen) Or the positive combination of the layered high nickel oxide content, produce higher energy density of batteries. The security risks of organic solvent electrolytes, accelerated the solid electrolyte, ionic liquid, polymer and its combination of the research. In addition, the current lithium ion battery technology and disorderly cooling and processing module is needed to keep the working temperature in 60 & deg; C below, if the temperature is always high, function and life of the battery will be severely damage. Therefore, whether the existing lithium ion battery or in the future lithium battery, the attention to solid electrolyte is still safe. Solid electrolyte type in addition to inorganic ceramic or glass electrolyte, recently, there are four kinds of electrolyte data proved more than lithium-ion energy storage: solid polymer electrolyte ( spe) , ionic liquids, gels and nanocomposites, and organic ion plastic crystals. According to the SPE and the study of Li metal batteries at high temperature ( 50 - 100℃) Still do well. At the same time, as high energy density battery electrolyte ionic liquids can provide many ideal and customizable features. For example, they have a lot of electrochemical ability, can complete metal anode and high pressure positive electrode, the smallest of combustible volatile and zero, and the higher temperature stability. Reviewed in this paper, based on polymer and ionic liquid of a new generation of development and prospect of solid electrolyte. 3. Development status and trend of the technology of solid electrolyte recently, Australia's deakin university Maria Forsyth professor ( Corresponding author) And others on accounts of chemical research published titled 'the innovation on the basis of ionic liquid electrolyte and polymer -- of the next generation Review articles of solid-state batteries. In this article, the author reviewed the his team some of the work in these areas. Sodium, magnesium, zinc and aluminum metal lithium is also regarded as substitute for energy storage. However, the study of the alkali metal based energy storage application data needed is still in a relatively primary stage. Second, the electrolyte plays an important role in completing these equipment, like Li skills. The author also comments on some of them in these areas and their latest development on the future direction in the field of view. Studies have also shown that block copolymer with ionic liquid electrolytes used in combination, has good mechanical properties and high ionic conductivity. The resulting data will make all the function of high solid electrolyte battery with functions of decoupling of ion transport machinery. 3. 1. Anionic single ion conductor ion conductor: a kind of polymer electrolyte, the anion attached on the polymer backbone, limit the freedom of movement, lead to cationic became the only free movement of ions, cation transport Numbers of surface is equal to 1. Recent studies have shown that armand group ionic conductivity of the single ion conductor is usually lower than double ion conductor. Then, on the basis of the research on the single ion conductor system, put forward to improve the single ion conductor ionic conductivity of the two main strategies: one, to improve the ionic conductivity of single ion conductor; Ionic conductivity polymer skeleton and dynamic decoupling. 1) Copolymerization method increases the period of migration dynamics between a large number of anionic polymer can be used as the single ion conductor of lithium and sodium. In the author's research, mainly concentrated in the vinyl, acrylamide and methyl acrylate based single ion conductor. Because of the radical polymerization not only economy, but also has high tolerance to the ionic functional groups, therefore has chosen the radical polymerization technique. The general chemical structure of these polymers as shown in figure 1 a. For example, a single poly ion conductor ( Lithium 1 - ( 3 - ( methylacrylenoxy) Propyl sulfonic acid) 1 - ( Trifluoromethyl sulfonyl) Imide) ( PMTFSI) Developed by the author exhibits higher glass transition temperature ( Tg > 90℃) , so low room temperature conductivity, with the added flexibility epoxy ethane polymer skeleton.