Gas Leakage Detection for Novel CF3I Environmentally Friendly Gas Insulated Equipment Based on BN 2D Nanolayers

The environmentally friendly insulating gas trifluoroiodomethane (CF3I) is widely researched and used in electrical insulating equipment because of its excellent electrical properties. However, gas-insulated equipment has the problem of insulating gas leakage, which is becoming more and more prominent with the large amount of insulating gases used. To this end, this study investigates the adsorption characteristics of palladium (Pd)-doped hexagonal boron nitride (h-BN) on CF3I. The key adsorption parameters, such as adsorption energy, adsorption distance, charge transfer amount and density of states, were obtained based on the first nature principle and density functional theory, and the response characteristics and response mechanism of Pd-BN to CF3I gas were explained from the microscopic point of view. The results show that after the adsorption of CF3I gas molecules by Pd-BN, the energy gap becomes larger and the conductivity’s will decrease. Therefore, the leakage detection of Pd-BN material on CF3I gas insulated equipment can be realized by the change of material resistance.