Salazar-Gastélum Luis Javier, Arredondo-Espínola Alejandro, Pérez-Sicairos Sergio, Álvarez-Contreras Lorena, Arjona Noé, Guerra-Balcázar Minerva
Facultad de Ingeniería, División de Investigación y Posgrado, Universidad Autónoma de Querétaro, Querétaro 76010, Santiago de Querétaro, Mexico.
Centro de Investigación y Desarrollo Tecnológico en Electroquímica S. C., Sanfandila 76703, Pedro Escobedo, Mexico.
Membranes (Basel). 2025 Apr 1;15(4):102. doi: 10.3390/membranes15040102.
Solid polymer electrolytes (SPEs) are gaining attention as viable alternatives to traditional aqueous electrolytes in zinc-air batteries (ZABs), owing to their enhanced performance and stability. In this study, anion-exchange solid polymer electrolytes (A-SPEs) were synthesized via electrophilic aromatic substitution and substitution reactions. Thin films were prepared using the solvent casting method and characterized using proton nuclear magnetic resonance (¹H-NMR), Fourier-transform infrared spectroscopy (FT-IR), and thermogravimetric analysis (TGA). The ion-exchange capacity (IEC), KOH uptake, ionic conductivity, and battery performance were also obtained by varying the degree of functionalization of the A-SPEs (30 and 120%, denoted as PSf30/PSf120, respectively). The IEC analysis revealed that PSf120 exhibited a higher quantity of functional groups, enhancing its hydroxide conductivity, which reached a value of 22.19 mS cm. In addition, PSf120 demonstrated a higher power density (70 vs. 50 mW cm) and rechargeability than benchmarked Fumapem FAA-3-50 A-SPE. Postmortem analysis further confirmed the lower formation of ZnO for PSf120, indicating the improved stability and reduced passivation of the zinc electrode. Therefore, this type of A-SPE could improve the performance and rechargeability of all-solid-state ZABs.
固态聚合物电解质（SPEs）作为锌空气电池（ZABs）中传统水性电解质的可行替代品正受到关注，这得益于其增强的性能和稳定性。在本研究中，通过亲电芳香取代和取代反应合成了阴离子交换固态聚合物电解质（A-SPEs）。使用溶液浇铸法制备薄膜，并通过质子核磁共振（¹H-NMR）、傅里叶变换红外光谱（FT-IR）和热重分析（TGA）对其进行表征。还通过改变A-SPEs的功能化程度（分别为30%和120%，表示为PSf30/PSf120）获得了离子交换容量（IEC）、氢氧化钾吸收量、离子电导率和电池性能。IEC分析表明，PSf120表现出更高数量的官能团，提高了其氢氧化物电导率，达到了22.19 mS cm的值。此外，与基准Fumapem FAA-3-50 A-SPE相比，PSf120表现出更高的功率密度（70对50 mW cm）和可充电性。死后分析进一步证实，PSf120的ZnO形成较少，表明锌电极的稳定性提高且钝化减少。因此，这种类型的A-SPE可以提高全固态ZABs的性能和可充电性。
