Synergistic Effect of Polydopamine-Modified CaZrO3 Perovskite and Hydroxylated SPEEK on Acid–Base Cation Exchange Membrane Fuel Cells,Energy & Fuels

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Synergistic Effect of Polydopamine-Modified CaZrO3 Perovskite and Hydroxylated SPEEK on Acid–Base Cation Exchange Membrane Fuel Cells
Energy & Fuels ( IF 5.2 ) Pub Date : 2021-09-29 , DOI: 10.1021/acs.energyfuels.1c03068
Raja Pugalenthi M ₁ , Ramesh Prabhu Manimuthu ₁

Affiliation

Polydopamine-coated calcium zirconate (DCZT) nanoparticles are synthesized and dispersed in the hydroxylated sulfonated poly(ether ether ketone) (SPEEK-OH) to prepare a nanohybrid combination (SPEEK-DCZT). SPEEK-OH is prepared via the reduction process and verified by the NMR study. The formation of DCZT through condensation reaction is confirmed by FTIR, XPS, and FE-SEM analysis. The polydopamine in DCZT provides good dispersion and creates acid–base bridges (−S–O^–···⁺H–HN−) at the filler and polymer interfaces via ionic interaction, improving the compatibility of the SPEEK-OH matrixes. Moreover, the acid–acid interaction that also exists between the SPEEK-OH matrixes via sulfonic and hydroxyl groups (−S–O^–...⁺HO) enhances the transport (Grotthuss) and thermomechanical property. At 6 wt % DCZT, SPEEK-OH shows a superior Young’s modulus (662 MPa) and transition temperature (98 °C) and also shows the highest water uptake and lowest swelling ratio (47.3 and 26.2% at 80 °C). This membrane exhibits the highest conductivity of 70.9 mS cm^–1 and a power density of 155 mW cm^–2 at 80 °C with 75%RH, which are higher than those of SPEEK (9.53 mS cm^–1 and 59 mW cm^–2) and Nafion 117 (63.2 mS cm^–1 and 142 mW cm^–2).

中文翻译：

聚多巴胺修饰的 CaZrO3 钙钛矿和羟基化 SPEEK 对酸碱阳离子交换膜燃料电池的协同作用

合成聚多巴胺包覆的锆酸钙 (DCZT) 纳米粒子并将其分散在羟基化磺化聚醚醚酮 (SPEEK-OH) 中以制备纳米杂化物组合 (SPEEK-DCZT)。SPEEK-OH 是通过还原过程制备的，并通过 NMR 研究进行验证。FTIR、XPS 和 FE-SEM 分析证实了通过缩合反应形成 DCZT。DCZT 中的聚多巴胺提供良好的分散性，并通过离子相互作用在填料和聚合物界面处产生酸碱桥 (-S-O ^– ... ⁺ H-HN-)，提高了 SPEEK-OH 基质的相容性。此外，SPEEK-OH 基质之间也存在通过磺酸基和羟基（-S-O ^– ... ⁺H2O) 增强传输 (Grotthuss) 和热机械性能。在 6 wt% DCZT 下，SPEEK-OH 显示出优异的杨氏模量 (662 MPa) 和转变温度 (98 °C)，并且还显示出最高的吸水率和最低的溶胀率（80 °C 时为 47.3% 和 26.2%）。该膜的最高电导率为 70.9 mS cm ^–1，在 80 °C 和 75% RH 下的功率密度为 155 mW cm ^–2，高于 SPEEK（9.53 mS cm ^–1和 59 mW cm ^–2 ) 和 Nafion 117（63.2 mS cm ^–1和 142 mW cm ^–2）。

更新日期：2021-10-22

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