Researchers at Oak Ridge National Laboratory (ORNL), led by the Department of Energy, have developed a thin, flexible solid-state electrolyte that could significantly enhance energy storage in next-generation batteries for electric vehicles, mobile devices, and laptops. By using a polymer to create a robust yet flexible thin film, the team has advanced the production of solid-state batteries, which promise greater safety, performance, and energy density compared to traditional batteries using liquid electrolytes. The innovative electrolyte film, which is as thin as 30 micrometers, aims to double energy storage capacity to 500 watt-hours per kilogram, offering longer battery life in various applications.
The research, published in ACS Energy Letters, involved optimizing the polymer binder for sulfide-based solid-state electrolytes, achieving a balance between ion conduction and structural integrity. The team found that the molecular weight of the polymer binder is crucial for the durability of the electrolyte films, with heavier binders providing greater structural stability and requiring less material. This innovation could pave the way for scalable production of solid-state batteries, with the researchers planning further tests and collaborations with industry, academia, and government to develop practical applications. The project was supported by the DOE’s Vehicle Technologies Office, and ORNL’s extensive facilities and multidisciplinary expertise were instrumental in advancing this technology.
