Used as a high-energy-density material in advanced energetic formulations, such as propellants and pyrotechnics, due to its ability to release significant thermal energy upon decomposition. It serves as a cesium source in specialized boron-rich compounds for neutron shielding and radiation detection applications. Its unique cluster structure also makes it valuable in research on boron-based materials for solid-state chemistry and potential use in hydrogen storage systems. Additionally, it has been explored in the development of ionic conductors for high-temperature electrochemical devices.