What are the outstanding advantages of solid-state lithium batteries?

Energy security functions continue to improve, and solid lithium batteries have outstanding advantages. Solid lithium batteries are expected to become an important development direction for the next generation of lithium batteries. In order to end the established high energy density policy, various countries are actively carrying out pioneering research on batteries such as lithium-sulfur batteries, lithium-air batteries, or lithium metal batteries. According to the trend and development process of energy density development at that time, my country’s proposed high energy density of 400Wh/kg in 2025 accelerated the development and application of new battery technology. At present, the energy density of all solid-state lithium batteries developed by some companies can reach 300-400wh/kg, which is expected to become an important development direction for the next generation of high-energy-density power supply and energy storage battery technology. The development and application of all-solid-state lithium batteries has become the consensus of academia and industry. The solid-state lithium battery is different from the traditional lithium battery in the solid state of the electrolyte. The all-solid-state lithium battery is the same as the traditional lithium battery, including the battery core (positive electrode, negative electrode, electrolyte), and its working principle is the same as that of the traditional lithium battery. Electrolytes, solid lithium batteries and polymers, inorganic solid electrolytes replace traditional liquid electrolytes for lithium batteries (organic electrolytes), when the main sulfur-containing LISICON sulfides and oxides, and lithium borohydride polymer solid electrolytes, such as different centers Because of the difference, electrolyte salts and alienation and binders and other chemical substances are no longer used, and the structure of all solid-state lithium batteries is greatly simplified. The current electrolyte research is first satisfied with the development of high-conductivity composite electrolytes. In terms of the positive electrode, in previous research, LiCoO2 is mainly used as the positive electrode material of solid-state lithium batteries. In addition, there are traditional oxide cathodes such as LiFePO4, LiMn2O4, and ternary materials, which are also compatible with high-voltage oxide cathodes and high-capacity sulfide cathodes. The research direction of the positive electrode will focus on the interface impedance of the negative electrode, the positive high-power discharge function, such as in-situ surface treatment. In terms of anodes, in addition to graphite anodes, solid-state lithium batteries are also developing and applying a series of high-functional anode materials, including metallic lithium (lithium-In alloy), carbon-based (carbon-based, silicon-based, tin-based), and oxide anodes. Materials, etc. Solid lithium batteries have good safety and high energy density. Solid-state lithium batteries inherit the advantages of traditional lithium batteries, greatly improving their safety and energy density. 1) High safety: Compared with traditional lithium batteries, the most prominent advantage of all solid-state batteries is safety. Liquid electrolyte is flammable and explosive. The growth of lithium dendrites during charging and discharging will only penetrate the gaps, causing short circuits in the battery, posing a safety hazard. The solid electrolyte is non-flammable, non-corrosive, non-volatile, has no leakage problems, and also overcomes the phenomenon of lithium dendrites, so the all-solid-state battery has high safety. 2) New energy density: First, the addition of voltage channels will increase the energy density of the battery. Organic electrolytes have a limited electrochemical window and are difficult to be compatible with lithium metal cathodes and newly developed high-potential anode materials. The solid electrolyte has a wider electrochemical window than the organic electrolyte, which is beneficial to further increase the energy density of the battery. Second, the solid electrolyte can isolate the growth of lithium dendrites, which greatly improves the system planning of material application, and lays the foundation for new lithium battery technology with higher energy density space. Now all solid lithium batteries can supply energy densities as high as 300-400wh/kg. 3) Enhanced circulation function: The liquid electrolyte irreversibly reacts with lithium ions during the charge and discharge process to form a solid electrolyte interface membrane (SEI), which leads to the loss of active materials and electrolytes, and reduces the Coulomb power. The solid electrolyte solves the solid electrolyte interface membrane (SEI) and lithium dendritic phenomenon, greatly improving the cycle and service life of the lithium battery. 4) Applicable planning expansion: solid electrolyte gives solid lithium batteries a compact structure. Statement: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Common terms for drone batteries