Phosphate esters are organic compounds containing phosphoric acid groups that have been used as battery additives due to their flame retardant and electrolyte stabilizing properties. They are commonly added to lithium-ion batteries to improve safety and performance by reducing the risk of thermal runaway and enhancing ionic conductivity. Phosphate esters also help protect battery electrodes from degradation and extend the overall life of the battery. Their chemical stability and compatibility with battery chemistries make them a valuable addition to battery formulations. The use of phosphate esters in battery additives is a growing trend in the development of safer and more efficient energy storage systems.