Metal-organic frameworks (MOFs)-doped hybrid SPAEK-based proton exchange membranes (PEMs) can combine the advantages of both to promote the comprehensive performance of hybrid membranes. However, the complicated preparation process and low yield of functionalized MOF restricted their application in organic-inorganic hybrid PEMs. Herein, an amino-sulfonic acid-based bi-functionalized MOF (MNCS), containing flexible sulfonic acid chains, was prepared by an uncomplicated and efficient one-step modification method. The sulfonic acid groups on MNCS were grafted to the end of flexible side chains with large free volume, which facilitated the formation of broad and continuous proton transport channels to reduce the activation energy of proton transport. Meanwhile, the amino groups of MNCS establish a second proton transport channel with the sulfonic acid groups in SPAEK due to acid-base pair interactions. Furthermore, owing to the formation of the ionic cross-linking structure, the dimensional stability and methanol resistance of MNCS@SNF-PAEK were significantly improved. Especially, MNCS@SNF-PAEK-1.5 showed the highest proton conductivity of 0.188 S cm⁻¹,endowing it with a maximum power density of 90.8 mW cm⁻² in direct methanol fuel cell (DMFC), which substantially exceeded that of pristine SNF-PAEK membrane. It illustrated that the hybrid membranes by incorporating MNCS showed promising potential in DMFC.

金属有机框架（MOFs）掺杂的基于SPAEK的混合质子交换膜（PEMs）可以结合两者的优点来提升混合膜的综合性能。然而，功能化MOF的复杂制备工艺和低产率限制了其在有机-无机杂化PEMs中​​的应用。在此，通过一种简单有效的一步改性方法制备了一种基于氨基磺酸的双功能化 MOF（MNCS），含有柔性磺酸链。MNCS上的磺酸基团接枝到自由体积大的柔性侧链末端，有利于形成宽阔连续的质子传输通道，降低质子传输的活化能。同时，由于酸碱对相互作用，MNCS 的氨基与 SPAEK 中的磺酸基团建立了第二个质子传输通道。此外，由于离子交联结构的形成，MNCS@SNF-PAEK的尺寸稳定性和耐甲醇性得到显着提高。特别是 MNCS@SNF-PAEK-1.5 表现出最高的质子电导率 0.188 S cm^-1，使其在直接甲醇燃料电池 (DMFC) 中具有 90.8 mW cm ^-2的最大功率密度，大大超过原始 SNF-PAEK 膜的功率密度。它表明通过结合 MNCS 的混合膜在 DMFC 中显示出有希望的潜力。