Considering its high theoretical energy density and high safety, the all-solid-state lithium-sulfur battery (ASSLSB) has become a promising candidate for the next-generation energy storage system. However, the low reactivity of sulfur and high interfacial resistances between the cathodes and solid electrolytes seriously hinder the practical application of high performance ASSLSBs. Sulfurized polyacrylonitrile (S@pPAN), which can effectively alleviate the volume expansion of sulfur, is a suitable choice for the sulfur cathode, but shows limited performance in ASSLSB. Here, we demonstrate a tellurium-doped S@pPAN (Te_0.05S_0.95@pPAN) cathode coated with solid electrolyte (Li₇P₃S₁₁) for an ASSLSB with high reactivity and significant cycling stability. Benefiting from the thin layer coating of Li₇P₃S₁₁ and the effect of Te-doping, the Te_0.05S_0.95@pPAN@Li₇P₃S₁₁ composite delivers significantly enhanced reaction kinetics and excellent interfacial compatibility with the solid electrolyte. At room temperature, the assembled ASSLSB exhibits excellent rate and long cycling performance, with a reversible capacity over 1173.1 mAh g⁻¹ and stable cycling over 500 cycles. The strategy of Te-doping and surface coating not only is facile and promising, but also provides guidance for constructing applicable ASSLSBs.

考虑到其高理论能量密度和高安全性，全固态锂硫电池（ASSLSB）已成为下一代储能系统的有希望的候选者。然而，硫的低反应性以及阴极与固体电解质之间的高界面电阻严重阻碍了高性能ASSLSB的实际应用。可以有效减轻硫的体积膨胀的硫化聚丙烯腈（S @ pPAN）是硫阴极的合适选择，但在ASSLSB中的性能有限。在这里，我们演示了涂有固体电解质（Li ₇ P ₃ S ₁₁）的掺碲S @ pPAN（Te _0.05 S _0.95 @pPAN）阴极）用于具有高反应活性和显着循环稳定性的ASSLSB。得益于Li ₇ P ₃ S ₁₁的薄层涂层和Te掺杂的影响，Te _0.05 S _0.95 @ pPAN @ Li ₇ P ₃ S ₁₁复合材料可显着增强反应动力学，并与固体电解质具有出色的界面相容性。在室温下，组装好的ASSLSB表现出出色的速率和长循环性能，可逆容量超过1173.1 mAh g ^-1在500个循环中保持稳定的循环。Te掺杂和表面涂层的策略不仅简便且有前途，而且为构建适用的ASSLSB提供了指导。