Kim, Taebin Oh, Kyeong-Seok Oh, Sejung Jung, Jong Gun Kim, Gwanho Kim, Woojoong Kim, Yeonji Kim, Jiwon Kang, Hyunseo Lee, Sang-Young Park, Cheolmin 2025-08-20T07:05:13Z 2025-08-20T07:05:13Z 2025-08-20 2025-10 0935-9648 https://pubs.kist.re.kr/handle/201004/153000 The development of ionic materials with high ionic conductivity and mechanical strength is challenging. This study presents a novel synthetic strategy for the development of a mechanically robust and ionically conductive polyampholyte elastomer based on ionic dimers (IDs) with strong ionic bonds between imidazolium and sulfonate. Polymerization of ID monomers with a network that forms a cross-linking moiety results in a novel polyampholyte ID elastomer (IDE). The addition of lithium (Li) salts in the IDE substantially enhances the ionic conductivity up to 0.82 mS cm-1 with a high Li+ transference number (tLi(+)) of 0.79. The mechanical properties of the IDE with Li salts are remarkable, with a tensile strength of 27.4 MPa and a Young's modulus of 211 MPa, outperforming previous polyampholyte elastomers. A resistive-type iontronic sensor using the IDE exhibited excellent sensitivity (gauge factor = 2.92) and reliable cycle performance (approximate to 400 cycles) under repetitive stress. The IDE serves as a polymer electrolyte in a pouch-type full cell, showing stable capacity at a high current density of 1.0 C (corresponding to 4.0 mA cm-2) under ambient conditions (25 degrees C, 0.2 MPa). This synthetic strategy offers a new approach for designing ionic materials with high conductivity and mechanical strength. English WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Mechanically Robust and Ion-Conductive Polyampholyte Elastomers via Dimeric Ionic Bonding Article 10.1002/adma.202508670 1 Advanced Materials, v.37, no.40 Advanced Materials 37 40 Y scie scopus 001540267900001 2-s2.0-105011970616 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article HYDROGELS TOUGHNESS ionic conductivity ionic dimer elastomer mechanical strength resistive-type iontronic sensor all-solid-state batteries