A solid-state lithium-sulfur battery (SSLSB) exhibits much higher theoretical energy density compared with current intercalation electrode-based lithium-ion batteries (LiBs) and possesses excellent safety originated from the less flammable electrolyte. However, a small sulfur loading and limited utilization of active material hamper its practical application. Besides, an elevated temperature is usually required for the operation of SSLSBs. In the present work, a homogeneous nanostructured sulfur-Ketjen black (S@KB) composite cathode was synthesized through an energy-efficient deposition method. A stable and highly ionic conductive composite polymer-ceramic electrolyte (CPE) was employed as the solid-state electrolyte. The SSLSB delivered a pronounced specific capacity of 1108 mA h g⁻¹ and areal capacity of 1.77 mA h cm⁻², and demonstrated stable cycling for 50 cycles. Also, benefiting from fast reaction kinetics, the SSLSB was able to operate at 20 °C and established an excellent rate capability. These results emphasize the morphology control of the cathode plays a critical role in the electrochemical performance of SSLSBs.

固态锂硫电池（SSLSB）与目前基于插层电极的锂离子电池（LiBs）相比，具有更高的理论能量密度，并且由于其易燃电解质而具有出色的安全性。然而，少量的硫负载和活性材料的有限利用妨碍了其实际应用。此外，SSLSB的操作通常需要升高温度。在本工作中，通过节能沉积方法合成了均相的纳米结构硫-科琴黑（S @ KB）复合阴极。稳定且高离子导电性的复合高分子陶瓷电解质（CPE）被用作固态电解质。SSLSB的比容量明显达到1108 mA hg ^-1面积容量为1.77 mA h cm ^-2，并显示出50个循环的稳定循环。此外，得益于快速的反应动力学，SSLSB能够在20°C的温度下运行并建立了出色的速率能力。这些结果强调了阴极的形态控制在SSLSBs的电化学性能中起着至关重要的作用。