
Lithium Difluoro(oxalato)borate, with the CAS number 409071-16-5, is a significant chemical product. It is a white to off - white powder at room temperature. The molecular formula of Lithium Difluoro(oxalato)borate is C₂BF₂LiO₄, and its molecular weight is approximately 143.77 g/mol. This product has a high purity level, usually above 99%. It has good solubility in some organic solvents such as ethylene carbonate, dimethyl carbonate, etc., which makes it suitable for various applications in the field of electrochemistry.
Lithium Difluoro(oxalato)borate is mainly used in the field of lithium - ion batteries. In lithium - ion battery electrolytes, it can act as an additive. It can form a stable solid electrolyte interphase (SEI) film on the surface of the anode, which effectively inhibits the decomposition of the electrolyte and the side - reactions between the electrolyte and the electrode, thereby improving the cycle performance and safety of the battery. Moreover, it can enhance the high - temperature performance of the battery, reduce the internal resistance of the battery, and improve the charging and discharging efficiency. Besides, it is also used in some research on new - type electrochemical energy storage devices, providing a new direction for the development of high - performance energy storage systems.
When using Lithium Difluoro(oxalato)borate in the production of lithium - ion battery electrolytes, it is necessary to pay attention to the following points. First, it should be stored in a dry and cool environment to prevent moisture absorption and decomposition. Before use, it should be fully dried to ensure its quality. When adding it to the electrolyte, it is recommended to use a proper solvent to dissolve it first. The addition amount generally accounts for 1% - 5% of the total mass of the electrolyte. The specific addition amount needs to be adjusted according to the specific requirements of the battery system. During the addition process, it should be slowly added under stirring conditions to ensure uniform dispersion in the electrolyte. In addition, safety protection measures should be taken during operation, such as wearing protective gloves and goggles.
Case 1: A battery manufacturing company used Lithium Difluoro(oxalato)borate as an additive in the electrolyte of a lithium - ion battery for electric vehicles. After adding it with an appropriate amount, the cycle life of the battery increased from 800 cycles to more than 1200 cycles. At the same time, the high - temperature performance of the battery was significantly improved. At a high temperature of 60°C, the battery's capacity retention rate after 100 cycles increased from 70% to 85%, which effectively improved the overall performance and reliability of the electric vehicle battery.
Case 2: A research institution was studying a new - type lithium - sulfur battery. By adding Lithium Difluoro(oxalato)borate to the electrolyte, the shuttle effect of polysulfides was effectively suppressed. The coulombic efficiency of the battery increased from 90% to more than 95%, and the specific capacity after 50 cycles was maintained at more than 800 mAh/g, which provided a good solution for the practical application of lithium - sulfur batteries.
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Este es William, CEO de Zhishang Chemical Co., Ltd.
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