The corrosion of metal bipolar plates(BPs) in the environment of PEMFCs (proton exchange membrane fuel cells) not only increases the interfacial contact resistance (ICR) of BPs, but also poisons the proton exchange membrane and catalytic layer. In this work, different Ti-doped amorphous carbon (α-C) film were deposited on SS316L substrate though DC-balanced magnetron sputtering technology. The effect of Ti doping amount on the hybridization type and microstructure evolution mechanism of α-C film are explored, and its influence on corrosion resistance and electrical properties of the film was further evaluated. The results show that introduce Ti atoms to the α-C film can promote the sp² hybridization and generate the low resistivity carbide phase, which decrease the ICR of the film from 5.64 mΩ/cm² to 3.43 mΩ/cm². More importantly, the introduction of Ti atoms can also improve the stability of the α-C film under nobler potential (1.4 V (SCE)) environment, promote the durability of the film in the service environment. The Ti-doped α-C film can be used as a modified coating of SS316L and act as candidate supplies for PEMFCs.

PEMFC（质子交换膜燃料电池）环境中金属双极板（BPs）的腐蚀不仅增加了BPs的界面接触电阻（ICR），而且使质子交换膜和催化层中毒。在这项工作中，通过直流平衡磁控溅射技术在 SS316L 衬底上沉积了不同的 Ti 掺杂非晶碳 (α-C) 薄膜。探讨了Ti掺杂量对α-C薄膜杂化类型和微观结构演化机制的影响，并进一步评估了其对薄膜耐蚀性和电学性能的影响。结果表明，在α-C薄膜中引入Ti原子可以促进sp ²杂化并生成低电阻碳化物相，使薄膜的ICR从5.64 mΩ/cm ^{2 降低}至 3.43 mΩ/cm ²。更重要的是，Ti原子的引入还可以提高α-C薄膜在更高电位（1.4 V（SCE））环境下的稳定性，促进薄膜在服役环境中的耐久性。Ti掺杂的α-C薄膜可用作SS316L的改性涂层，并作为PEMFC的候选材料。