Polymeric films based on nickel complexes with salen-type ligands have received considerable attention recently owing to electrocatalytic, electrochromic, and charge storing properties. The latter makes them suitable metal-organic materials for electrochemical power sources, i.e., batteries and supercapacitors. Optimization of the properties of electrode materials is closely linked to the understanding of charge storage mechanisms. The introduction of CH₃O substituent into the molecule results in peculiar ionic transport mechanism, owing to the possibility of alkaline ions coordination.

Here we study the recharging mechanism of poly[Ni(CH₃Osalen)] films in various electrolyte solutions. In presence of alkali ions, the electronic effects of methoxy substituent provide mixed anionic and cationic charge compensation mechanism, as cations reversibly coordinate to the present pseudo-crown functionality. By applying the combination of XRD, CV/EQCM and EIS methods to the film in electrolytes containing Li⁺, Na⁺, K⁺, and Et₄N⁺ cations, and BF₄⁻, ClO₄⁻ and bistrifluoromethanesulfonimidate (TFSI⁻) anions, we propose a model that describes the ionic transport in such polymeric films and allows to estimate the anionic and cationic contribution to the total amount of transferred species during charging and discharging.

由于具有电催化、电致变色和电荷存储特性，基于镍络合物与Salen型配体的聚合物薄膜最近受到了相当大的关注。后者使它们适合用于电化学电源，即电池和超级电容器的金属有机材料。电极材料性能的优化与对电荷存储机制的理解密切相关。由于碱性离子配位的可能性，在分子中引入CH ₃ O 取代基会导致特殊的离子传输机制。

在这里，我们研究了聚[Ni(CH ₃ Osalen)] 薄膜在各种电解质溶液中的充电机理。在碱金属离子的存在下，甲氧基取代基的电子效应提供了混合的阴离子和阳离子电荷补偿机制，因为阳离子可逆地配位到目前的假冠官能团。通过将 XRD、CV/EQCM 和 EIS 方法的组合应用于含有 Li ⁺、Na ⁺、K ⁺和 Et ₄ N ⁺阳离子以及 BF ₄ ^-、ClO ₄ ^-和双三氟甲磺酰亚胺（TFSI ^-) 阴离子，我们提出了一个模型，该模型描述了这种聚合物薄膜中的离子传输，并允许估计在充电和放电期间阴离子和阳离子对转移物质总量的贡献。