Related Experiment Video
Updated: Jun 16, 2025
Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing
Published on: March 7, 2018
In-Situ Polymerized High-Voltage Solid-State Lithium Metal Batteries with Dual-Reinforced Stable Interfaces
Qiang Lv1,2, Cheng Li1, Yue Liu3
1MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China.
This study introduces a new method for solid-state lithium metal batteries using in situ polymerization to create stable interfaces. This approach enhances battery performance and longevity by improving contact between components.
Area of Science:
- Materials Science
- Electrochemistry
- Battery Technology
Background:
- Solid polymer electrolytes (SPEs) are crucial for high-energy solid-state lithium metal batteries (SSLMBs).
- Poor interfacial contact between components is a major limitation for SSLMBs.
- In situ polymerization offers a promising strategy to improve solid/solid interfaces and reduce impedance.
Purpose of the Study:
- To design high-voltage SSLMBs with dual-reinforced stable interfaces.
- To utilize in situ polymerization combined with interface modification for enhanced battery performance.
- To investigate the formation and stability of cathode-electrolyte interface (CEI) and solid electrolyte interface (SEI) films.
Main Methods:
- Interface modification using tetramethylene sulfone (TMS) and bis(2,2,2-trifluoromethyl) carbonate (TFEC).
- In situ polymerization technology inspired by medical applications.
- Theoretical calculations and time-of-flight secondary ion mass spectrometry (TOF-SIMS) analysis.
- Electrochemical testing of Li||SPE||Li and NCM||SPE||Li cells.
Main Results:
- TMS and TFEC selectively adsorb at the NCM cathode and Li anode interfaces, respectively.
- Formation of stable CEI and SEI films, ensuring superior interfaces with both electrodes.
- Li||SPE||Li cell sustained cycling for over 1000 hours at 0.3 mA cm⁻².
- NCM||SPE||Li cell achieved 86.8% capacity retention after 1000 cycles at 1 °C.
Conclusions:
- The developed dual-reinforced interface strategy effectively enhances the stability and performance of high-voltage SSLMBs.
- In situ polymerization is a key technology for creating robust interfaces in solid-state batteries.
- This work provides valuable insights for designing next-generation SSLMBs with improved interfacial properties.
