ArticleChemical science2026
Phosphonium outperforms ammonium poly(ionic liquids) for fast ion transport polymer electrolytes.
Article in Chemical science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Cationic poly(ionic liquids) (polyILs) are promising solid polymer electrolytes, yet the role of cationic charge-centre chemistry in regulating alkali-metal transport and interfacial behaviour remains poorly understood. Here, we computationally investigated a phosphonium-based polyIL at high lithium or sodium concentrations and compared these systems with previously reported ammonium-based analogues. The phosphonium systems demonstrated superior alkali-metal ion diffusion, which was consistent with their high ionic conductivities. Molecular-level analyses show that phosphonium cation chemistry does not necessarily lead to weaker isolated interactions with the anion, as demonstrated here. Rather, it is associated with weaker collective ionic interactions in the condensed phase, contributing to lower
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