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首页> 外文期刊>Advanced functional materials >Annealing-Free Thioantimonate Argyrodites with High Li-Ion Conductivity and Low Elastic Modulus
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Annealing-Free Thioantimonate Argyrodites with High Li-Ion Conductivity and Low Elastic Modulus

机译：Annealing-Free Thioantimonate Argyrodites with High Li-Ion Conductivity and Low Elastic Modulus

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Although Li-ion superconducting sulfides have been developed as solidelectrolytes (SEs) in all-solid-state batteries, their high deformability, whichis inherently beneficial for room-temperature compaction, is overlookedand sacrificed. To solve this dilemmatic task, herein, highly deformableLi-ion superconductors are reported using an annealing-free process. Thetarget thioantimonate, Li_(5.2)Si_(0.2)Sb_(0.8)S_4Br_(0.25)I_(1.75), comprising bimetallictetrahedra and bi-halogen anions is synthesized by two-step milling tunedfor in situ crystallization, and exhibits excellent Li-ion conductivity (σ_(ion)) of13.23 mS cm~(?1) (averaged) and a low elastic modulus (E) of 12.51 GPa (averaged).It has a cubic argyrodite phase of ≈57.39% crystallinity with a halogenoccupancy of ≈90.67% at the 4c Wyckoff site. These increased halogen occupancydrives the Li-ion redistribution and the formation of more Li vacancies,thus facilitating Li-ion transport through inter-cage pathway. Also, the facileannealing-free process provides a unique glass-ceramic structure advantageousfor high deformability. These results represent a record-breakingmilestone from the combined viewpoint of σion and E among promising SEs.Electrochemical characterization, including galvanostatic cycling tests for400 h, reveals that this material displays reasonable electrochemical stabilityand cell performance (150.82 mAh g~(?1) at 0.1C). These achievements shed lighton the synthesis of practical Ss suffice both σ_(ion) and E requirements.

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