Breakthrough in Quasi-Solid-State Batteries: Achieving High Safety and Energy Density

Strategic Insights -

Researchers from Shandong University have made a significant discovery in the field of battery technology, developing a quasi-solid-state battery with high safety and energy density. The new battery, which incorporates a quasolid gel electrolyte, shows great promise for practical applications. By leveraging the coordination between carbonyl oxygen atoms and lithium, the researchers have created a robust solid electrolyte interface, leading to improved battery performance.

Key Takeaways:

  • The research team developed a novel quasi-solid-state battery using a high flash point tetraglyme-based electrolyte and a polymer matrix synthesized by in situ polymerizing trifluoroethyl acrylate.
  • The battery shows improved safety and energy density, with a capacity retention of 92.7% after 200 cycles when matched with a commercial-level loading LiFePO cathode.
  • The researchers attributed the improved performance to the solvated structure predominantly characterized by the contact ion pair, which is formed due to the coordination between the polymer matrix and lithium.
  • Molecular dynamic simulations revealed that the solvated structure leads to a robust solid electrolyte interface, enriched with anion-derived LiF- and B-species.
  • The study highlights the potential of quasi-solid-state batteries for various applications, including Li/Na/K/Mg/Ca systems.
  • The research has been peer-reviewed and published in the journal Angewandte Chemie International Edition in 2025.

Statistics:

  • The capacity retention of the battery is 92.7% after 200 cycles.
  • The battery shows improved safety and energy density, making it a promising approach for practical applications.
  • The research team used molecular dynamic simulations to study the solvated structure and solid electrolyte interface.
  • The study highlights the importance of the polymer matrix in quasi-solid-state batteries.

Sources:

  • Angewandte Chemie International Edition, "Manipulating Competitive Li+ Coordination of F-Rich Polymer and High Flash Point Glyme Electrolyte Enabling High Rate and Intrinsically Safe Quasi-Solid-State Li Metal Batteries," 2025.
  • Zhiwei Ni, et al., "Manipulating Competitive Li+ Coordination of F-Rich Polymer and High Flash Point Glyme Electrolyte Enabling High Rate and Intrinsically Safe Quasi-Solid-State Li Metal Batteries," Angewandte Chemie International Edition, 2025.
  • NewsRx, "Recent Reports from Shandong University Highlight Findings in Science (Manipulating Competitive Li+ Coordination of F-Rich Polymer and High Flash Point Glyme Electrolyte Enabling High Rate and Intrinsically Safe Quasi-Solid-State Li Metal ...)," Chemicals & Chemistry, August 22, 2025, p 2355.