Abstract Scope |
This study explores the replacement of liquid electrolytes with solid-state electrolytes (SSEs) in lithium-sulfur batteries to improve thermal and electrochemical stability. To achieve high ionic conductivity, low interface resistance, and superior thermal/electrochemical stability of the electrolytes, we introduce a ceramic/polymer composite electrolyte membrane (CEM) developed via a traditional slurry casting method, incorporating inorganic Li7P2.9Ce0.1S11 (LPS) and organic poly (vinylidene fluoride) (PVDF) polymer. The addition of 10 wt% LPS ceramic powder to PVDF matrix resulted in impressive electrochemical properties, including an electrochemical window of 4.56 V. The CEM cell showed an initial discharge capacity of 1640 mAh g−1, maintaining 1175 mAh g−1 after 300 cycles, while the polymer electrolyte (PE) cell had an initial capacity of 1360 mAh g−1, which declined to 1194 mAh g−1 after 175 cycles. These results underscore the robustness and significantly improved the charge/discharge performance of the CEM for long-cyclable lithium-sulfur batteries. |