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In-situ polymerization strategy to construct stable electrode/electrolyte interfaces for high-performance lithium
Meng Li1, Zeren Zhou1, Qixian Zhang2
1School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China.
Journal of Colloid and Interface Science
|November 20, 2025
Summary
Researchers developed a new method using N,O-bis(trimethylsilyl)acetamide (BSA) and vinyl carbonate (VC) additives to create a stable solid electrolyte interface (SEI) for lithium metal batteries (LMBs), improving cycling performance and stability.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Unstable electrode/electrolyte interfaces limit lithium metal battery (LMB) applications.
- Developing stable solid electrolyte interfaces (SEI) is crucial for advanced batteries.
Purpose of the Study:
- To engineer a robust SEI for LMBs using in-situ polymerization.
- To enhance the electrochemical performance and cycle life of LMBs.
Main Methods:
- In-situ polymerization of N,O-bis(trimethylsilyl)acetamide (BSA) and vinyl carbonate (VC) additives.
- Electrochemical testing of Li||Li symmetric cells and LiFePO4 (LFP)||Li full cells.
Main Results:
- Synergistic additives (BSA and VC) formed a stable SEI, reducing interface impedance.
- Li||Li symmetric cells achieved stable cycling over 600 hours.
- LFP||Li full cells demonstrated excellent rate capability (118 mAh g⁻¹ at 10C) and cycle stability (2000 cycles).
Conclusions:
- The proposed strategy offers a facile and effective method for constructing stable interfaces in LMBs.
- In-situ polymerization of BSA and VC significantly improves LMB performance and durability.
