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MoO2‑Doped Li7P3S11 for High-Performance All-Solid-State Lithium Batteries
Ziheng Zhao1, Yuan Hua1, Peng Hang2
1School of Chemical and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, P. R. China.
ACS Omega
|January 5, 2026
Summary
Researchers enhanced sulfide solid electrolytes for all-solid-state lithium batteries (ASSLBs) by codoping with MoO2. This improves ionic conductivity and air stability, enabling stable battery cycling and higher capacity retention.
Area of Science:
- Materials Science
- Electrochemistry
- Solid-State Batteries
Background:
- Sulfide electrolytes are promising for all-solid-state lithium batteries (ASSLBs) due to their amorphous structure and softness.
- Key challenges include low ionic conductivity, poor lithium compatibility, and limited air stability.
Purpose of the Study:
- To develop a novel codoping strategy for glassy sulfide electrolytes.
- To enhance ionic conductivity, lithium compatibility, and air stability of Li7P3S11-based electrolytes.
Main Methods:
- Incorporation of MoO2 into Li7P3S11 via a codoping strategy.
- Fabrication and electrochemical testing of symmetric and full cells using the optimized electrolyte.
Main Results:
- Achieved an ionic conductivity of 2.57 mS/cm at room temperature.
- Demonstrated enhanced air stability and suppressed H2S generation.
- Symmetric cells showed stable cycling over 400 hours at 0.7 mA cm-2.
- Full cells exhibited 122.47 mAh·g-1 initial capacity and 77.31% retention after 100 cycles.
Conclusions:
- Codoping with MoO2 effectively improves ionic conductivity and air stability of sulfide electrolytes.
- The developed electrolyte shows potential for dendrite suppression and enhanced performance in ASSLBs.
