Nanocomposite membranes consisting of sulfonated perovskite-type strontium zirconite (sSrZrO₃) and sSrZrO₃@TiO₂ nanofillers integrated into a sulfonated polyether ether ketone (SPEEK) matrix have been explored as ion-exchange membranes for direct methanol fuel cells (DMFCs). The perovskite fillers improved the thermal and oxidative stabilities of the SPEEK membranes. Due to the hygroscopic characteristics of sSrZrO₃@TiO₂, the SPEEK/sSrZrO₃@TiO₂ nanocomposite membrane adsorbed a large amount of water, which facilitated the dissolution of acid moieties and led to enhanced proton conductivity. The narrower channels formed in the SPEEK/sSrZrO₃@TiO₂ nanocomposite via the uniform distribution of sSrZrO₃@TiO₂ fillers in the SPEEK matrix restricted fuel transport and improved the selectivity ratio of proton conductivity to methanol permeation. A DMFC constructed with the SPEEK/sSrZrO₃@TiO₂ membrane offered superior power and current densities of 140 mW cm⁻² and 639 mA cm⁻², respectively, at 80 °C, compared to those obtained with a Nafion 117 membrane.

中文翻译：

---

直接甲醇燃料电池用磺化聚醚醚酮/锆钛酸锶@TiO ₂纳米复合膜

由磺化钙钛矿型锶锆石（sSrZrO ₃）和sSrZrO ₃ @TiO ₂纳米填料集成到磺化聚醚醚酮（SPEEK）基质中的纳米复合膜已被用作直接甲醇燃料电池（DMFC）的离子交换膜。钙钛矿填料改善了SPEEK膜的热稳定性和氧化稳定性。由于sSrZrO ₃ @TiO ₂的吸湿特性，SPEEK / sSrZrO ₃ @TiO ₂纳米复合膜吸附了大量的水，从而促进了酸部分的溶解并提高了质子的电导率。在SPEEK / sSrZrO _3中形成的较窄通道@TiO ₂纳米复合材料通过sSrZrO的均匀分布₃ @TiO _2个填料在SPEEK矩阵受限燃料运输和改进的质子传导性，以甲醇渗透的选择性比率。与使用Nafion 117膜相比，用SPEEK / sSrZrO ₃ @TiO ₂膜构造的DMFC在80°C时分别具有140 mW cm ^-2和639 mA cm ^-2的优异功率和电流密度。