Herein, copper perrhenate (Cu(ReO₄)₂) was synthesized using a micro-emulsion method and adhered to graphene (Gr) using an ultrasonic process. Then, the as-prepared Cu(ReO₄)₂/Gr composite was added into the synthetic oil as a lubricant additive with the help of ionic liquid to achieve enhanced dispersion stability within the base oil. The tribological performances of the Cu(ReO₄)₂/Gr additive were investigated using four-ball tests and the ball-on-disk reciprocating configuration under various temperatures. The potential lubrication mechanisms of the Cu(ReO₄)₂/Gr additive were performed using a series of characterization methods including XRD, Raman, SEM-EDS, TEM, DSC/TG, and XPS. The results of four-ball tests at room temperature indicated that the Cu(ReO₄)₂/Gr additive could substantially improve the tribological performances of the base oil. The smallest coefficient of friction (COF) and wear scar diameter (WSD) values were 0.068 and 495 μm, respectively, when 0.05 wt% of Cu(ReO₄)₂/Gr was added. Additionally, the graphene accelerated friction-induced heat transfer, which led to decreased friction and wear. The results of reciprocating friction experiments at elevated temperatures revealed that the Cu(ReO₄)₂/Gr additive had excellent friction-reduction properties when the temperature was high. This could be attributed to the generation of a protective layer containing tribo-oxides from the alloy, some residual carbides and copper perrhenate induced by friction heat and stress. This protective layer was uniformly and stably covered on the worn surface, which could effectively alleviate direct contact between the rubbing pair.

在此，使用微乳液法合成高铼酸铜 (Cu(ReO ₄ ) ₂ )，并使用超声波工艺将其粘附到石墨烯 (Gr) 上。然后，在离子液体的帮助下，将制备的Cu(ReO ₄ ) ₂ /Gr 复合物作为润滑添加剂加入到合成油中，以提高在基础油中的分散稳定性。Cu(ReO ₄ ) ₂ /Gr 添加剂的摩擦学性能使用四球试验和球盘往复结构在不同温度下进行研究。Cu(ReO ₄ ) ₂的潜在润滑机制/Gr 添加剂使用一系列表征方法进行，包括 XRD、拉曼、SEM-EDS、TEM、DSC/TG 和 XPS。室温四球试验结果表明，Cu(ReO ₄ ) ₂ /Gr添加剂可以显着提高基础油的摩擦学性能。 当添加 0.05  wt% 的 Cu(ReO ₄ ) ₂ /Gr时，最小摩擦系数 (COF) 和磨痕直径 (WSD) 值分别为 0.068 和 495 μm 。此外，石墨烯加速了摩擦引起的热传递，从而减少了摩擦和磨损。高温往复摩擦实验结果表明，Cu(ReO ₄ ) ₂/Gr添加剂在高温下具有优异的减摩性能。这可能是由于从合金中产生了含有摩擦氧化物的保护层，一些残留的碳化物和由摩擦热和应力引起的高铼酸铜。该保护层均匀稳定地覆盖在磨损面上，可有效缓解摩擦副之间的直接接触。