BMIMBF4 is widely used as an ionic liquid in various electrochemical applications due to its high ionic conductivity and thermal stability. It serves as an electrolyte in batteries, including lithium-ion batteries, supercapacitors, and fuel cells, enhancing performance and efficiency in energy storage and release. Additionally, it is employed in electroplating processes to improve the quality and uniformity of metal coatings. In organic synthesis, BMIMBF4 acts as a solvent or catalyst, facilitating reactions such as esterification and polymerization. Its use in separation technologies, including liquid-liquid extraction and gas separation, is notable for its ability to selectively separate compounds, and it is studied for CO2 absorption as an environmentally friendly option to reduce greenhouse gas emissions. Furthermore, BMIMBF4 is utilized in the development of sensors and actuators, where its properties contribute to improved sensitivity and response times.