Superionic composite electrolytes with continuously perpendicular-aligned pathways for pressure-less all-solid-state lithium batteries

Solid electrolytes are promising candidates for safe, high-energy battery systems. Composite solid electrolytes, in particular, hold the potential to combine high ionic conductivity with stable electrode interfaces. However, a fundamental trade-off often exists between ion conduction and mechanical properties. Here we present a composite solid electrolyte design that decouples ion conduction from mechanical flexibility, achieving a high ionic conductivity of 10.2 mS cm−1 at 25 °C while maintaining close mechanical contact with the electrode. The composite architecture consists of alternating layers of perpendicularly aligned (PA) Li0.3Cd0.85PS3 nanosheets, to establish continuous superionic conduction…

• NN
  National Natural Science Foundation of China

  Awards: 52302332, 52188101, 22275205
• CP
  China Postdoctoral Science Foundation

  Awards: BX20230398, 2023M733644
• NK
  National Key Research and Development Program of China

  Award: 2022YFB3803400