Modulating multi-ion dynamics for high-performance iontronic systems

In nature, iontronic power generation often arises from complex mixtures of monovalent and multivalent ions, exemplified by osmotic power between seawater and river water. In contrast, most laboratory studies have relied on single-ion systems, overlooking the intricate interplay and additional free energy associated with multi-ion environments. Efficiently harvesting energy from such multi-ionic systems remains challenging due to strong ion-ion interactions, the inherent trade-off between ionic selectivity and permeability, and the limited efficiency of multi-ionic-electronic coupling at interfaces. Recent advances in iontronics offer new pathways to overcome these barriers by modulating multi-ionic dynamics…