What are the advantages of all solid-state lithium-ion batteries compared to liquid lithium-ion batteries

Since the liquid electrolyte contains flammable organic solvents, a sudden increase in temperature when an internal short circuit occurs will easily cause combustion or even explosion. It is necessary to install a safety device structure that resists temperature rise and short circuit. This will increase the cost, but it still cannot completely solve the safety problem. problem. The Tesla, which claims to be the best BMS in the world, has suffered a serious fire in ModelS this year in China alone. Many inorganic solid electrolyte materials are non-flammable, non-corrosive, non-volatile, and have no liquid leakage problems. They are also expected to overcome the lithium dendritic phenomenon. Therefore, all solid-state lithium secondary batteries based on inorganic solid electrolytes are expected to have high safety characteristics. Polymer solid electrolytes still have a certain combustible risk, but compared to liquid electrolyte batteries containing flammable solvents, their safety is also greatly improved. (2) High energy density At present, the energy density of lithium-ion battery cells used in the market is up to about 300Wh/kg. For all-solid-state lithium-ion batteries, if metal lithium is used as the negative electrode, the battery energy density is expected to reach 300-400Wh/kg, or even higher. It should be noted that because the density of solid electrolytes is higher than that of liquid electrolytes, the energy density of lithium-ion batteries with liquid electrolytes is significantly higher than that of all-solid-state lithium-ion batteries for the same system of positive and negative materials. The reason why the all-solid-state lithium secondary battery has a high energy density is because the negative electrode may use metal lithium materials. (3) Long cycle life The solid electrolyte is expected to prevent the continuous formation and growth of the solid electrolyte interface film during the charging and discharging process of the liquid electrolyte and the problem of lithium dendrites piercing the separator, which may greatly improve the cycle performance and service life of the metal lithium ion battery . (4) Wide operating temperature range. If all solid-state lithium-ion batteries use inorganic solid electrolytes, the maximum operating temperature is expected to increase to 300°C or higher. At present, the low-temperature performance of large-capacity all-solid-state lithium-ion batteries needs to be improved. The specific battery operating temperature range is mainly related to the high and low temperature characteristics of the electrolyte and interface resistance. (5) Wide electrochemical window The electrochemical stability window of the all-solid-state lithium-ion battery is wide, which may reach 5V, which is suitable for high-voltage electrode materials and is beneficial to further increase the energy density. The current mainstream ternary battery is between 4.2V-4.5V. (6) All solid-state lithium-ion batteries with flexibility advantages can be prepared into thin-film batteries and flexible batteries, which can be applied to smart wearable and implantable medical devices in the future. As for the flexible liquid electrolyte lithium-ion battery, packaging is easier and safer. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What type of battery is the button battery?