Jia Jia, Yu Hongmei, Gao Xueqiang, Chi Jun, Zeng Yachao, Qin Bowen, Yao Dewei, Song Wei, Shao Zhigang, Yi Baolian
Fuel Cell System and Engineering Group, Dalian Institute of Chemical Physics, Chinese Academy of Sciences 457 Zhongshan Road 116023 Dalian P. R. China
University of Chinese Academy of Sciences 19A Yuquan Road 100049 Beijing P. R. China.
RSC Adv. 2018 Apr 5;8(23):12887-12893. doi: 10.1039/c7ra13677c. eCollection 2018 Apr 3.
A novel cathode architecture using vertically aligned Co nanoneedle arrays as an ordered support for application in alkaline anion-exchange membrane fuel cells (AAEMFCs) has been developed. The Co nanoneedle arrays were directly grown on a stainless steel sheet a hydrothermal reaction and then a Pd layer was deposited on the surface of the Co nanoneedle arrays using a vacuum sputter-deposition method to form Pd/Co nanoneedle arrays. After transferring the Pd/Co nanoneedle arrays to an AAEM, a cathode catalyst layer was formed. Without the use of an alkaline ionomer, the AAEMFC with the prepared cathode catalyst layer showed an enhanced performance with ultra-low Pd loading of down to 33.5 μg cm, which is much higher than the conventionally used cathode electrode with a Pt loading of 100 μg cm. This is the first report where three-dimensional Co nanoneedle arrays have been used as the cathode support in an AAEMFC, which is able to deliver a higher power density without an alkaline ionomer than that of conventional membrane electrode assembly (MEA).
一种新型阴极结构已被开发出来，该结构使用垂直排列的钴纳米针阵列作为有序支撑体，应用于碱性阴离子交换膜燃料电池（AAEMFC）。通过水热反应将钴纳米针阵列直接生长在不锈钢片上，然后使用真空溅射沉积法在钴纳米针阵列表面沉积钯层，形成钯/钴纳米针阵列。将钯/钴纳米针阵列转移到碱性阴离子交换膜（AAEM）上后，形成阴极催化剂层。在不使用碱性离聚物的情况下，具有所制备阴极催化剂层的AAEMFC表现出增强的性能，钯负载量低至33.5μg/cm²，远高于传统使用的铂负载量为100μg/cm²的阴极电极。这是首次报道在AAEMFC中使用三维钴纳米针阵列作为阴极支撑体，该结构在不使用碱性离聚物的情况下能够提供比传统膜电极组件（MEA）更高的功率密度。
