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Small Additives Make Big Differences: A Review on Advanced Additives for High-Performance Solid-State Li Metal
Donggun Kim1, Xin Hu1, Baozhi Yu1
1Institute for Frontier Materials, Deakin University, Waurn Ponds, VIC, 3216, Australia.
Advanced Materials (Deerfield Beach, Fla.)
|June 27, 2024
Summary
Additives significantly enhance solid-state lithium metal batteries by improving ionic conductivity and interfacial stability. These additives also prevent lithium dendrite growth, boosting battery safety and lifespan.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Solid-state lithium (Li) metal batteries offer higher energy density and safety than Li-ion batteries.
- Solid-state electrolytes (SSEs) face challenges including low ionic conductivity, interfacial instability, and lithium dendrite formation.
- Additives are crucial for overcoming these limitations in SSEs.
Purpose of the Study:
- To comprehensively review various additives used in solid-state electrolytes (SSEs).
- To explore the incorporation methods and mechanisms of these additives.
- To provide insights for developing advanced SSEs for Li metal batteries.
Main Methods:
- Literature review of additives in solid-state electrolytes.
- Analysis of additive effects on ionic conductivity and interfacial properties.
- Investigation of mechanisms for inhibiting lithium dendrite growth.
Main Results:
- Additives improve ionic conductivity, approaching liquid electrolyte levels.
- Additives enhance mechanical properties, preventing SSE cracking and maintaining stable interfaces.
- Additives effectively suppress dendritic lithium growth, improving battery safety and longevity.
Conclusions:
- Additives are vital for enhancing the performance and safety of solid-state Li metal batteries.
- Understanding additive mechanisms is key to designing next-generation SSEs.
- This review guides researchers toward more efficient and reliable solid-state battery development.
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