Phosphonium-based room temperature ionic liquids (P-RTILs) offer outstanding lubricant properties. Studies have shown that the cationic chain length and anionic ring size significantly affect the performance of P-RTIL lubricants by altering properties, such as viscosity, density, thermal stability, wettability, and solubility. Functionalized moieties further improve their performance. However, the presence of halide groups could introduce corrosion and toxicity, which could be minimized by non-halide anions with large alkyl-chain-carrying cations to optimize both corrosion and tribological performance of P-RTILs. In this review, state-of-the-art research of P-RTILs is summarized from the lubrication perspective, covering their synthesis, properties, lubricant-relevant mechanisms, and performance matrices. Finally, the potential for developing a circular economy enabled by the biodegradability, recovery, and alternative applications of P-RTILs is discussed.

基于鏻的室温离子液体 (P-RTIL) 具有出色的润滑性能。研究表明，阳离子链长和阴离子环大小通过改变粘度、密度、热稳定性、润湿性和溶解性等特性，显着影响 P-RTIL 润滑剂的性能。功能化部分进一步提高了它们的性能。然而，卤化物基团的存在会引入腐蚀和毒性，这可以通过具有大烷基链阳离子的非卤化物阴离子最小化，以优化 P-RTIL 的腐蚀和摩擦学性能。在这篇综述中，从润滑角度总结了 P-RTIL 的最新研究，涵盖了它们的合成、性能、润滑剂相关机制和性能矩阵。最后，