Dynamic Metal–Ligand Coordination-Assisted Ionogels for Deformable Alternating Current Electroluminescent Devices,ACS Applied Materials & Interfaces

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Dynamic Metal–Ligand Coordination-Assisted Ionogels for Deformable Alternating Current Electroluminescent Devices
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-05-31 , DOI: 10.1021/acsami.3c03812
Seong Hyuk Hong ₁ , Yong Min Kim ₁ , Hong Chul Moon ₁

Affiliation

Overcoming the trade-off between the mechanical robustness and conductivity of ionic conductors is a crucial challenge for deformable ionotronics. In this work, we propose a simple but effective gelation strategy for selectively improving the mechanical robustness of ionogels without compromising their ionic conductivity. To achieve this, we introduce dynamic metal–ligand coordination chemistry into the ionic liquid (IL)-insoluble domains of a physically crosslinked ionogel network structure. As a result, the overall mechanical property is remarkably improved with the aid of additional chemical crosslinking. This strategy does not require any additional heat/light (UV) treatments to induce chemical crosslinking. The homogeneous physically/chemically dual crosslinked ionogel films can be readily obtained by simply casting a solution containing Ni²⁺ sources, copolymer gelators, and ILs. The effects of adjusting fundamental parameters on the ionogel properties are investigated systematically. The optimized mechanically robust and highly conductive ionogels are successfully employed as deformable ionic electrodes in alternating-current electroluminescent displays, indicating their high practicality. Overall, these results validate that exploiting metal–ligand coordination dynamic bonding is an extremely straightforward strategy for selectively improving the mechanical characteristics of conductive ionogels, which are promising platforms for deformable ionotronics.

中文翻译：

用于可变形交流电致发光器件的动态金属-配体配位辅助离子凝胶

克服离子导体的机械强度和导电性之间的权衡是可变形离子电子学的关键挑战。在这项工作中，我们提出了一种简单但有效的凝胶化策略，可以在不影响离子电导率的情况下选择性地提高离子凝胶的机械强度。为实现这一目标，我们将动态金属-配体配位化学引入物理交联的离子凝胶网络结构的离子液体 (IL) 不溶性区域。结果，在额外的化学交联的帮助下，整体机械性能得到显着改善。该策略不需要任何额外的热/光 (UV) 处理来诱导化学交联。均匀的物理/化学双重交联离子凝胶薄膜可以通过简单地浇铸含 Ni 的溶液而容易地获得²⁺来源、共聚物胶凝剂和离子液体。系统地研究了调整基本参数对离子凝胶性能的影响。经过优化的机械强度高且导电性高的离子凝胶已成功用作交流电致发光显示器中的可变形离子电极，表明它们具有很高的实用性。总的来说，这些结果证实，利用金属-配体配位动态键合是一种非常直接的策略，可以选择性地改善导电离子凝胶的机械特性，导电离子凝胶是可变形离子电子学的有前途的平台。

更新日期：2023-05-31

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