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Article Abstract
Herein, we report the self-assembly of a -symmetric -icosahedron based on a desymmetrized terpyridine ligand. The participant triflimide (NTf) interacts with a rectangular aperture, templating the generation of . With the addition of the other smaller anions (50-90 Å) into , supramolecular conversion to highly symmetric () cuboctahedron can be observed due to optimizing the binding capabilities between anions and apertures of metallo-organic cages. This supramolecular conversion enables selective tight and multiple anion bindings with a clear binding mechanism and has been utilized to facilitate the dissociation of lithium-anion pairs and immobilization of anions in lithium metal batteries. Introducing into solid polymer electrolytes can increase the lithium ion transference number to 0.78, significantly enhancing the lithium ion conductivity within the electrolyte and enriching the lithium ion flux for transport. Consequently, the composite electrolyte exhibits excellent lithium ion transport kinetics, thereby endowing lithium metal batteries with superior electrochemical performance.
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