02-August-2024
Lithium batteries, as an indispensable power source for modern electronic devices, have always been a focus of scientific research and industry in terms of performance optimization and enhancement. Fumed alumina, with its unique nano-scale characteristics, plays an increasingly important role in the field of lithium batteries.
Fumed alumina has a small particle size (10-40nm) and a high specific surface area (50-100 m²/g), which makes it have excellent dispersion and interfacial compatibility in lithium batteries. Its surface is usually positively charged, which helps to improve stability and conductivity in the electrolyte.
Cathode Material Modification: Fumed alumina can be coated on the surface of cathode materials through mechanical mixing, forming a uniform and dense Al₂O₃ protective layer. This protective layer can effectively prevent corrosion and dissolution of the cathode materials during the charge and discharge process, improving the battery's cycle stability and capacity retention.
Separator Material Modification: Fumed alumina dispersion can be applied to the field of battery separators, forming a thin and dense alumina coating. This coating not only improves the thermal stability of the separator and reduces the shrinkage rate at high temperatures but also enhances the wettability of the separator with the electrolyte, thereby improving the battery's safety and electrochemical performance.
Electrolyte Modification: Fumed alumina can be used as a modifier for the electrolyte, improving the bonding force between the coating and the separator through functional treatment, promoting the formation of colloidal electrolytes, and enhancing the battery's cycle stability and safety.
Improving Battery Performance: The addition of fumed alumina can form a protective film during the battery charge and discharge process, reducing direct contact between the electrolyte and electrode materials, decreasing side reactions, and extending battery life.
