AI 中文总结
研究针对全固态电池的问题，合成Li6.6Si0.6Sb0.4S5I碘银矿电解质，与LiNbO3涂层阴极集成成电池，该电池室温离子电导率高，宽温循环稳定，定制电解质组成和复合阴极配置提升了电池性能，展现出Si掺杂碘银矿在高性能全固态电池中的潜力。
AI 中文摘要
固态锂离子电池因其出色的能量密度和安全性而日益受到认可。然而，热和电化学不稳定性、枝晶形成以及与高压阴极的兼容性有限等问题阻碍了其广泛应用。硫化物基固体电解质，特别是碘银矿，具有出色的离子导电性和稳定性，但空间电荷层的形成、离子传输缓慢和枝晶穿透易感性限制了其实际应用。为应对这些挑战，通过球磨和热处理合成了新型Li6.6Si0.6Sb0.4S5I碘银矿电解质，室温离子电导率达9.9 mS cm^-1。将该电解质与LiNbO3涂层的LiNi0.7Co0.1Mn0.2O2阴极集成形成全固态电池，初始放电容量为171.2 mAh g^-1，在0.5C下200次循环后容量保留84.2%，在-20℃至60℃宽温度范围内保持稳定循环。研究表明，定制的电解质组成和复合阴极配置显著提高了循环稳定性并改善了界面保护。这些发现突出了Si掺杂锑型碘银矿在下一代高性能全固态电池中的潜力，可在不同热条件下实现持久运行。
英文摘要
Solid-state lithium-ion batteries (LIBs) are increasingly recognized for their exceptional energy density and safety. However, their widespread adoption is challenged by persistent issues such as thermal and electrochemical instability, dendrite formation, and limited compatibility with high-voltage cathodes. Sulfide-based solid electrolytes (SEs), particularly iodide argyrodites, offer outstanding ionic conductivity and stability; however, their practical application is constrained by the formation of space-charge layers, slow ion transport, and susceptibility to dendrite penetration. To address these challenges, we synthesized a novel Li6.6Si0.6Sb0.4S5I argyrodite electrolyte via ball milling and heat treatment, achieving a remarkable room-temperature ionic conductivity of 9.9 mS cm^-1. The electrolyte was integrated with a LiNbO3-coated LiNi0.7Co0.1Mn0.2O2 cathode to form an all-solid-state battery, which demonstrated an initial discharge capacity of 171.2 mAh g^-1, retained 84.2% of its capacity after 200 cycles at 0.5C, and maintained stable cycling across a broad temperature range from -20 degrees C to 60 degrees C. Our study shows that tailored electrolyte composition and a composite cathode configuration significantly enhance cycling stability and improve interfacial protection. These findings highlight the potential of Si-doped antimony-type iodide argyrodites for next-generation high-performance all-solid-state batteries, offering durable operation under diverse thermal conditions.
Journal refJournal of Power Sources 692 (2026) 240991
DOI：10.1016/j.jpowsour.2026.240991
