Abstract Anion exchange membranes (AEMs) have been studied to improve conductivity for their high performance. The functional groups with positive charge could construct ion channels, which is the significant factor in determining the anions conductivity through the membrane. This report demonstrates the use of a new 2D nanomaterial as filler used in the quaterized polysulfone (QPSU) matrix for composite membrane performance enhancement of alkaline anion exchange membrane fuel cells (AAEMFCs). Ti3C2Tx is functionalized with quaternary ammonium groups successfully etched by NH4HF2. The two kinds Ti3C2Tx are synthesized and incorporated into QPSU based membranes by using a solution blending method. The QPSU/NH4HF2-Ti3C2Tx composite membrane exhibits the hydroxide ionic conductivity nearly 2 times higher than that both of pristine QPSU and QPSU/LiF-Ti3C2Tx membranes among 20–60 °C, and leads to substantial increase in peak power density of AAEMFCs by ~ 30% at 60 °C. The results indicate NH4+ groups on the MXene surface further enhance the OH- conductivity. Furthermore, the QPSU membranes addition with two kinds Ti3C2Tx both exhibit good mechanical property and thermal stability, and hold promise for application in AAEMFCs.

中文翻译：

---

用于碱性阴离子交换膜燃料电池的季铵化聚砜膜中的季铵 Ti 3 C 2 T x 增强离子传导

摘要 阴离子交换膜 (AEM) 已被研究以提高其高性能的电导率。带正电荷的官能团可以构建离子通道，这是决定阴离子通过膜电导率的重要因素。本报告展示了使用新型二维纳米材料作为季铵化聚砜 (QPSU) 基质中的填料，以增强碱性阴离子交换膜燃料电池 (AAEMFC) 的复合膜性能。Ti3C2Tx 被NH4HF2 成功蚀刻的季铵基团官能化。两种 Ti3C2Tx 被合成并通过溶液混合方法掺入基于 QPSU 的膜中。QPSU/NH4HF2-Ti3C2Tx 复合膜在 20-60°C 下的氢氧离子电导率比原始 QPSU 和 QPSU/LiF-Ti3C2Tx 膜高近 2 倍，并导致 AAEMFCs 的峰值功率密度显着增加~ 60°C 时为 30%。结果表明 MXene 表面上的 NH4+ 基团进一步增强了 OH- 电导率。此外，添加了两种 Ti3C2Tx 的 QPSU 膜均表现出良好的机械性能和热稳定性，有望在 AAEMFC 中应用。