The fabrication of proton exchange membranes with a short conduction pathway in the direction of membrane thickness is desirable for fuel cell applications. In this study, a new nanohybrid additive (Co₃O₄-NH₂/H₃PW₁₂O₄₀; CAW) is synthesized, by anchoring phosphotungstic acid (H₃PW₁₂O₄₀; HPW) on aminopropylsiloxane-functionalized cobalt oxide, and then it is incorporated into the Nafion (NF) matrix to prepare nanocomposite membranes by film casting from CAW dispersions in NF solutions. To obtain short-pathway proton-conducting channels, through the nanocomposite membranes drying process, a magnetic field is employed to align the nanohybrid particles in transversal (thickness) direction of the NF matrix. Furthermore, the alignment of nanohybrids is observed directly by scanning electron microscopy, and estimated indirectly by proton conductivity and methanol permeability values. It is found that alignment of nanohybrids in the NF matrix elevates the conductivity of proton as well as the permeability of methanol. The aligned NF/CAW nanocomposite membrane with 1 wt% of CAW reveals the highest proton conductivity of 211 mS cm⁻¹ at 90 ^°C and 95% relative humidity, which is 39% higher than that of pure NF (152 mS cm⁻¹). Interestingly, through the orientation of CAW, 76% improvement in the selectivity of the membranes is observed.

制造在膜厚度方向具有短传导路径的质子交换膜对于燃料电池应用是可取的。在这项研究中，一个新的纳米杂化物添加剂（共₃ ö ₄ -NH ₂ / H ₃ PW ₁₂ ö ₄₀ ; CAW）被合成时，由锚定磷钨酸（H ₃ PW ₁₂ Ô ₄₀; HPW) 在氨基丙基硅氧烷官能化的氧化钴上，然后将其掺入 Nafion (NF) 基质中，通过从 CAW 分散体在 NF 溶液中进行薄膜浇铸来制备纳米复合膜。为了获得短路径质子传导通道，通过纳米复合膜干燥过程，采用磁场在 NF 基质的横向（厚度）方向上排列纳米混合颗粒。此外，纳米杂化物的排列通过扫描电子显微镜直接观察，并通过质子电导率和甲醇渗透率值间接估计。发现纳米杂化物在 NF 基质中的排列提高了质子的电导率以及甲醇的渗透性。具有 1 wt% CAW 的对齐 NF/CAW 纳米复合膜显示最高质子电导率为 211 mS cm^-1在 90  ^° C 和 95% 的相对湿度下，比纯 NF (152 mS cm ^-1 )高 39% 。有趣的是，通过 CAW 的取向，观察到膜的选择性提高了 76%。