All-solid-state batteries are bound to become a trend. What are the highlights of it?

So far, through the continuous efforts of scientists, solid-state battery technology should be said to have no insurmountable technical bottlenecks, but there are still technical problems to be solved. 'The core technology of solid-state batteries is solid electrolyte material technology that achieves high ionic conductivity and advanced manufacturing technology that achieves low-impedance solid-solid interface. 'Che Yong further explained. In terms of solid electrolyte materials, Professor Katsuji Kanno of Tokyo Institute of Technology in Japan invented a sulfide solid electrolyte with an ion conductivity of '10-2S/cm at room temperature (surpassing traditional organic electrolytes) in 2011. Solid-state batteries have very significant advantages. Because solid-state electrolytes replace the potentially explosive organic electrolytes in traditional lithium-ion batteries, this solves the dilemma of high energy density and high safety, which will eliminate the'endurance of electric vehicle users' Anxiety', even fast charging is expected.　This technology has become the technological foundation of Toyota Motor, a leading company in the industrialization of solid-state batteries. Compared with sulfide solid electrolytes, oxide solid electrolytes have advantages in terms of high safety and ease of production, but the improvement of ion conductivity at room temperature is still a problem of the century. What are the advantages of solid-state batteries? 1) At present, the most secure solid-state batteries are inherently safer than existing lithium-ion batteries and have higher energy density. Li-ion batteries rely on flammable liquid electrolytes to quickly transfer the chemical energy stored in molecular bonds To the electric energy. The researchers converted the liquid electrolyte into the solid polymer inside the electrochemical cell, taking advantage of the characteristics of liquid and solid to overcome the current key limitations affecting battery design. In this case, the solid electrolyte can prevent the metal from forming dendrites, which can cause short circuits, overheating, and failure of the battery. 2) Higher energy density. One is the improvement of the voltage platform. The negative electrode is metal lithium, the positive electrode is high-potential material, and the electrochemical window is above 5V; after using all solid electrolytes, lithium ion batteries do not need to use lithium-inserted graphite negative electrodes, but directly use metal Lithium is used as the negative electrode, which can greatly reduce the amount of negative electrode material, so that the energy density of the entire battery is significantly improved. 3) Long cycle life The design and development of solid-state batteries has a cycle life of more than 1200 times compared with traditional lithium-ion batteries. It is expected to prevent the continuous formation and growth of SEI film and lithium dendrites piercing the diaphragm during the charging and discharging process of the liquid electrolyte, greatly improving The cycleability and service life of metal lithium-ion batteries. 4) Wide operating temperature range The researchers said that because the solids are tighter and stronger, this highly conductive solid-state lithium-ion battery can supply power in a wider temperature range and is more resistant to physical damage and high temperatures. The new material called lithium super-ion conductor (Li10GeP2S12) developed by the research team still uses lithium as ion conductor, but coated them with a layer of crystal structure. They tested this solid-state lithium-ion battery and found that it is The electrical conductivity has reached the level of existing liquid lithium-ion batteries, and the new battery can work in a temperature range between -100°C and 100°C. 5) Fast rechargeable solid-state batteries can achieve stable charging and discharging cycles at room temperature, and can be quickly charged at the same time. The new solid-state battery can be fully charged in only 1 hour. 6) Thin film flexibility can be made into a very small battery is also a major feature of all solid-state battery technology, which can facilitate the battery to adapt to the application of various new small-size smart electronic devices, and at this point the traditional lithium-ion battery Technology is difficult to achieve. The all-solid-state battery can be further optimized and turned into a flexible battery, thereby bringing more functions and experiences. 7) The packaging of the multi-functional packaged solid-state battery is relatively simple, which can save the battery pack shell, cooling and other systems, and at the same time realize the flexibility and profile of the battery, and design different shapes according to different application scenarios, which is more flexible. 8) The production efficiency is improved without the need to encapsulate liquid, and it supports serial stacking arrangement and bipolar mechanism, which can reduce the ineffective space in the battery pack and improve production efficiency. Finally, the industrialization of all-solid-state batteries is an inevitable trend and an important factor in the revolutionary changes of electric vehicles in the future. At present, countries around the world are racing to promote the industrialization of all solid-state batteries. This will be the most competitive field in the power battery industry in the future. 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 article: How to read the parameters marked on lithium-ion power batteries