The performance of a lithium-ion battery is not solely determined by its electrodes but also critically depends on the electrolyte formulation. The electrolyte, a complex mixture of lithium salts, organic solvents, and additives, must be carefully balanced to ensure efficient ion transport, stability, and safety. Lithium difluoro(oxalato)borate (LiDFOB) is a powerful electrolyte additive that works synergistically with other components to optimize battery performance, particularly in advanced applications.

LiDFOB's effectiveness is amplified when used in conjunction with appropriate electrolyte salts and solvents. The most common lithium salt used in commercial lithium-ion batteries is LiPF6. While LiPF6 offers good conductivity, it is prone to decomposition, especially in the presence of moisture, generating species like HF. LiDFOB's ability to scavenge HF and stabilize interfaces complements LiPF6, mitigating its drawbacks and contributing to a more robust electrolyte system.

The choice of organic solvents also plays a crucial role in LiDFOB's performance. Common solvents like ethylene carbonate (EC), dimethyl carbonate (DMC), and ethyl methyl carbonate (EMC) are often used in combination. LiDFOB's decomposition mechanisms are intertwined with these solvents. For instance, on the anode, LiDFOB's reduction can occur synergistically with EC, leading to the formation of stable SEI layers containing B-O-C and B-F bonds. These layers are more uniform and electronically insulating than those formed by EC alone, enhancing the anode's stability and reversibility.

Moreover, LiDFOB's compatibility with different cathode materials is also enhanced by the overall electrolyte formulation. When paired with high-voltage nickel-rich cathodes, the CEI layer formed with LiDFOB's assistance, often incorporating BF3 and BF2OH species, provides exceptional protection against oxidative degradation. This is crucial for maintaining the cathode's structural integrity and electrochemical activity over many cycles.

The optimization of electrolyte formulations is a complex interplay of various chemical species. LiDFOB acts as a key enabler, enhancing the functionality of the base electrolyte system. Its ability to improve low-temperature performance, increase power capability, and extend cycle life makes it an invaluable component for developing next-generation lithium-ion batteries. Manufacturers specializing in battery chemicals, such as NINGBO INNO PHARMCHEM CO.,LTD., focus on producing high-purity LiDFOB that can effectively integrate into diverse electrolyte formulations, driving innovation in the energy storage sector.