State-independent ionic conductivity

• 成果类型: Article
• 署名作者: Barclay, J.; Williamson, J. M.; Litt, H.; Cowling, S. J.; Shimizu, K.; Freitas, A. A.; Poppe, S.; Sturala, J.; Sun, Y.; Kohout, M.; Avestro, A. -J.; Lopes, J. N. Canongia; Groves, C.; Jones, J. C.; McGonigal, P. R.
• 署名单位: University of York - UK; Durham University; University of Leeds; Universidade de Lisboa; Martin Luther University Halle Wittenberg; University of Chemistry & Technology, Prague; University of Oxford; Durham University
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-8075; 1095-9203
• DOI: 10.1126/science.adk0786
• 发表日期: 2025-12-18
• 页码: 1254-1258
• 关键词: STRUCTURAL-CHARACTERIZATION; FREE ANALYZER; electrolytes; DYNAMICS; transport; alkyl; gromacs; liquids; TRAVIS; anion

摘要

Liquids lend themselves to high ionic conductivities because of their molecular-level positional and orientational disorder, which enables the free movement of ions. However, there is an unavoidable steep drop in ionic conductivity upon phase transition from a fluid state to the more ordered solid state. Here, we describe organic salts that maintain the same ionic conductivity mechanism across transitions between three states of matter, from an initial isotropic liquid to a liquid crystalline state and then to a crystalline solid. We achieved this property by minimizing the ion-pairing interactions between mobile ions and highly diffuse counterions that assemble in a stepwise manner to preserve conformational flexibility across phase transitions. This state-independent ionic conductivity opens up opportunities to exploit liquid-like ionic conductivity in organic solids.