‌In lithium-ion batteries and other battery technologies, lithium tetrafluoroborate is used as an electrolyte and additive, which can significantly improve the cycle stability of LiPF6-based electrolyte systems and improve the overall performance of batteries. As an electrolyte, it is suitable for the manufacture and use of primary lithium batteries or secondary lithium-ion batteries. In addition, lithium tetrafluoroborate can also adjust the viscosity of the electrolyte, which is suitable for different types of capacitors and electrode materials.

Lithium tetrafluoroborate LiBF4 has a small anion radius (0.227 nm), which makes the coordination ability of the electrolyte lithium salt with lithium ions relatively weak. In organic solvents, it can easily dissociate, thereby improving the conductivity of lithium batteries and thus improving battery performance. However, due to its small anion radius, it is also easy to coordinate with organic solvents in the electrolyte, resulting in relatively low lithium ion conductivity. Therefore, LiBF4 is less used in room temperature lithium batteries.

LiBF4 exhibits excellent thermal stability in high temperature environments and is not easy to decompose. This makes it an ideal choice for high temperature lithium batteries.

At the same time, LiBF4 also exhibits excellent battery performance in low temperature environments. This is due to the significant reduction in the interface impedance of LiBF4-based electrolytes under low temperature conditions. In addition, LiBF4 has a certain corrosion resistance to the current collector Al, which makes it often used as an additive to lithium-ion battery electrolytes to increase the corrosion potential of the electrolyte to the current collector Al.