Researchers at Oak Ridge National Laboratory (ORNL) have developed a novel solid-state battery electrolyte membrane that could significantly improve battery technology. The team, led by Dr. Guang Yang, created a thin, flexible electrolyte using a polymer binder optimized for sulfide electrolytes.
This innovation has the potential to increase energy storage capacity to 500 watt-hours per kilogram, a significant improvement for various electronic devices and electric vehicles. The new electrolyte sheets combine durability with high conductivity, paving the way for safer and more efficient solid-state batteries compared to current liquid electrolyte systems.
The research, published in ACS Energy Letters, investigated the optimal balance between ionic conductivity and structural integrity in the electrolyte film. The results revealed the critical role of the molecular weight of the polymer binder in producing durable, highly conductive films.
Advanced characterization techniques, including scanning electron microscopy and synchrotron radiation analysis, were used to examine the microstructure of the electrolyte film. This detailed analysis was instrumental in improving the electrolyte’s performance and stability.
ORNL’s specialized facilities, including low humidity areas and dedicated glove boxes for sulfide research, were critical to the success of the project. The research team is now working to integrate the thin film into next-generation electrodes for real-world battery testing.
This study, funded by the U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy’s Vehicle Technologies Office, demonstrates the potential of solid-state batteries to advance energy storage technology. The researchers plan to work with industry, academic and government partners to further develop and test the film in various applications.
Source: Oak Ridge National Laboratory
