The all-solid-state lithium-sulfur battery (ASSLSB) shows promise for high specific energy and safety, but faces challenges like poor rate performance and short cycle life.
Our demonstration of lithium thioborophosphate iodide (LBPSI) glass-phase solid electrolytes enabled faster solid-solid sulfur redox reactions, enhancing active site density and overall efficiency of ASSLSBs.
The ASSLSB exhibits ultrafast charging capability, achieving a specific capacity of 1,497mAhg1sulfur at 2C, maintaining 784mAhg1sulfur at 20C.
With 80.2% capacity retention across 25,000 cycles at a charge rate of 5C, our findings suggest significant improvements in cycling stability for ASSLSBs.
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