Kim, Woong-Ju Choi, Ji Woong Lee, Hyuk Jun Kim, Min Sang Jung, Sang Won Kang, Jin Gu Kim, Dong-Wan 2025-07-18T08:30:48Z 2025-07-18T08:30:48Z 2025-07-18 2025-08 1614-6832 https://pubs.kist.re.kr/handle/201004/152810 Achieving high interfacial kinetics for Zn metal anodes, without triggering the hydrogen evolution reaction (HER) and corrosion, remains a challenge. Particularly, studies on promoting kinetics in an H2O-poor electrical double layer (EDL) are extremely rare. This study introduces a macromolecular hydrogel interfacial layer, comprising alginate (Alg), poly(2-acrylamido-2-methyl-1-propanesulfonic acid) (PAMPS), and polyaniline (PANI) (APP), to address this issue by engineering the EDL on Zn. The APP layer facilitates Faradaic processes such as de-solvation and surface diffusion through PANI, while suppressing the HER and corrosion through an H2O-poor and SO42--poor EDL. The uniform distribution of the electric field and ion flux, along with the high mechanical stability offered by APP, effectively mitigates Zn dendrite growth. Consequently, APP-Zn electrodes demonstrate excellent electrochemical performance, including a high Coulombic efficiency (approximate to 99.6%) over 700 cycles at 10 mA cm-2 in asymmetric cells and a high cumulative capacity of 1.8 Ah cm-2 in symmetric cells. English Wiley-VCH Verlag Ionically Cross-Linked Composite Hydrogel Modulating an Electrical Double Layer on Zn Metal Anodes for Enhanced Kinetics and Stability Article 10.1002/aenm.202501610 1 Advanced Energy Materials, v.15, no.30 Advanced Energy Materials 15 30 N scie scopus 001513676000001 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Energy & Fuels Materials Science Physics Article ZINC SINGLE electrical double layer hydrogen evolution reaction kinetics macromolecular coating mechanical stability Zn metal anode corrosion