Overview: Bi₂S₃ is used to replace Germanium (Ge) to form a new type of solid electrolyte Li₁₀BiₓP₂S₁₂₋ₓ. The traditional LGPS solid electrolyte (e.g., Li₁₀GeP₂S₁₂) has excellent ion conductivity, but the high cost and scarcity of Ge limit its large-scale application. By introducing urchin-like Bi₂S₃, it not only provides high capacity potential in terms of structure but also effectively buffers volume and thermal expansion problems during cycling.
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Practical Applications:
• Bi₂S₃ partially replaces Ge to form high conductivity electrolyte (LiBiPS).
• Bi₂S₃ acts as an interface lithium storage layer to enhance battery capacity.
• Bi₂S₃/LGPS composite electrolyte improves cycle stability.
• Bi₂S₃ doped LGPS used in synergy with high-capacity cathodes.
• Bi₂S₃ doped LGPS used in flexible solid-state batteries.