Single-Ion Conducting Composite Electrolytes with Tunable Anion Traps for Dendrite-Free Fast Charging

While research like Nicotera et al. (2022) explores single-ion conducting polymer electrolytes (SLIC-SPEs) to suppress the shuttle effect in Li–S batteries, this idea expands the paradigm: create a family of composite electrolytes for standard LIBs that combine ionomers (e.g., lithiated Nafion) with engineered inorganic nanofillers featuring surface anion-trap functionalities. By tuning the surface chemistry of the fillers (possibly using sulfonic, phosphonic, or borate groups), mobile anions are immobilized, achieving high Li⁺ transference numbers and minimizing concentration polarization—critical for high-rate charging. This approach directly targets the root cause of dendrite growth (local Li depletion and polarization) and offers a pathway for safer, longer-lasting, and faster-charging solid-state batteries. The novelty lies in the modular, tunable nature of the anion traps, which could be tailored for various battery chemistries and operational regimes.

References:

1. Nanoscale Ionic Materials for Nafion Based Nanocomposites Membranes As Single Lithium-Ion Conducting Polymer Electrolytes for Lithium Sulfur Batteries. I. Nicotera, Ernestino Lufrano, C. Simari, A. Enotiadis, S. Brutti, Maryam Nojabaee, Brigitta Sievert (2022). ECS Meeting Abstracts.