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Topology Fortified Anodes Powered High-Energy All-Solid-State Lithium Batteries
Xinxin Zhang1,2, Hailong Yu1,2, Liubin Ben1,2,3
1Beijing National Laboratory of Condensed Matter Physics, Chinese Academy of Sciences, Institute of Physics, Beijing, 100190, China.
Advanced Materials (Deerfield Beach, Fla.)
|May 19, 2025
Summary
Researchers developed topology fortified anode (TFA) materials for all-solid-state lithium batteries (ASSLBs). These novel anodes significantly improve lithium metal anode stability and performance, overcoming key limitations for commercial applications.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Lithium metal anodes offer high capacity but suffer from volume changes and low pressure tolerance in all-solid-state lithium batteries (ASSLBs).
- These limitations hinder the commercial viability of ASSLBs, despite their potential for high energy density.
Purpose of the Study:
- To introduce topology fortified anode (TFA) materials to enhance the stability and performance of lithium metal anodes in ASSLBs.
- To overcome the challenges of volume changes and improve external pressure tolerance for practical ASSLB applications.
Main Methods:
- Development of TFA materials featuring a 3D lithiophilic Li5B4 skeleton and an optimized electroactive lithium phase.
- Integration of broadened external pressure tolerance into the TFA material design.
- Electrochemical testing of TFA-based symmetric and full cells, including cycling stability and critical current density measurements.
Main Results:
- TFA materials exhibit near-zero volume changes and a fivefold increase in external pressure tolerance compared to pure lithium metal.
- Symmetric cells with TFA anodes show 3.6-fold higher critical current density and stable cycling over 6,000 hours.
- Full cells utilizing TFA anodes and FeS2 cathodes achieve 62% active lithium utilization and 70% capacity retention after 800 cycles at high current density.
Conclusions:
- Topology fortified anode materials offer a revolutionary design approach for high-energy anodes in ASSLBs.
- The enhanced mechanical stability and lithium ion transport of TFA materials pave the way for advanced ASSLB development.
- This strategy holds promise for improving battery technologies beyond current lithium-based systems.
