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Keywords:

  • batteries;
  • ionic conductivity;
  • lithium;
  • sulfidophosphates;
  • sulfur
Thumbnail image of graphical abstract

Sulfur-rich lithium polysulfidophosphates (LPSPs) act as an enabler for long-lasting and efficient lithium–sulfur batteries. LPSPs have ionic conductivities of 3.0×10−5 S cm−1 at 25 °C, which is 8 orders of magnitude higher than that of Li2S. The high lithium ion conductivity imparts excellent cycling performance, and the batteries are configured in an all-solid state, which promises safe cycling with metallic lithium anodes.