Yoonjae Cho, Jung Hwan Song, Ji Eun Wang, Do Kyung Kim and Dong Jun Kim
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引用次数: 0
Abstract
The synthesis and characterization of Sn-doped Li6PS5Cl0.5Br0.5 solid-state electrolytes are presented. By incorporating Cl and Br, the solubility of Sn dopants in the argyrodite framework is significantly improved without compromising the high ionic conductivity of material. Sn substitution for P enhances both the chemical robustness and interfacial stability of the electrolyte, addressing key challenges in electrolyte stability. The inclusion of Sn strengthens the structural integrity of Li6PS5Cl0.5Br0.5, mitigating atmospheric degradation. Electrochemical studies reveal that Sn doping markedly increases ionic conductivity and reduces the activation energy for Li-ion mobility, thereby improving battery performance. Structural analyses indicate that Sn incorporation expands the unit cell and facilitates the formation of a Li–Sn alloy at the electrolyte–electrode interface. This alloy formation promotes rapid Li-ion migration and stabilizes the interface, contributing to enhanced electrochemical stability. The findings underscore the synergistic benefits of halogen substitution and Sn doping, demonstrating their collective impact on the performance and durability of sulfide-based solid electrolytes.
期刊介绍:
Materials Chemistry Frontiers focuses on the synthesis and chemistry of exciting new materials, and the development of improved fabrication techniques. Characterisation and fundamental studies that are of broad appeal are also welcome.
This is the ideal home for studies of a significant nature that further the development of organic, inorganic, composite and nano-materials.