Chinese researchers make breakthrough in interface engineering of solid-state lithium batteries
Chinese researchers have recently achieved a breakthrough in solid-state lithium batteries, introducing a new method for overcoming the challenges of high interfacial resistance and sluggish diffusion properties in the development of practical solid-state batteries, the Xinhua News Agency reported on Tuesday, citing the Institute of Metal Research under the Chinese Academy of Sciences.
Solid-state lithium batteries are widely seen as next-generation energy storage solutions due to their high safety and energy density. However, the development of practical solid-state batteries is hindered by their high interfacial resistance and sluggish diffusion properties, primarily due to the heterogeneous interfaces between the solid electrolyte and the electrode.
To address this challenge, the research team developed an all-in-one polymer electrode-electrolyte material, which covalently integrates ethylene oxide groups for Li+ transport and trisulfide linkages for redox-active sites. This material exhibits excellent ionic conductivity as a solid electrolyte, while its reversible redox activity activates below 2.5 V versus Li⁺/Li, according to the results published in the journal Advanced Materials recently.
The researchers also fabricated flexible all-solid-state batteries using this material. These batteries demonstrated outstanding bending resistance, surviving up to 20,000 bending cycles with no significant performance loss. When integrated as a polymer electrolyte in composite cathodes, the material increased energy density by 86 percent. This work establishes a new paradigm for multifunctional polymers that integrates ion transport and energy storage, offering a versatile platform for flexible, high-energy solid-state batteries, Xinhua reported, citing the researchers.
Global Times
Solid-state lithium batteries are widely seen as next-generation energy storage solutions due to their high safety and energy density. However, the development of practical solid-state batteries is hindered by their high interfacial resistance and sluggish diffusion properties, primarily due to the heterogeneous interfaces between the solid electrolyte and the electrode.
To address this challenge, the research team developed an all-in-one polymer electrode-electrolyte material, which covalently integrates ethylene oxide groups for Li+ transport and trisulfide linkages for redox-active sites. This material exhibits excellent ionic conductivity as a solid electrolyte, while its reversible redox activity activates below 2.5 V versus Li⁺/Li, according to the results published in the journal Advanced Materials recently.
The researchers also fabricated flexible all-solid-state batteries using this material. These batteries demonstrated outstanding bending resistance, surviving up to 20,000 bending cycles with no significant performance loss. When integrated as a polymer electrolyte in composite cathodes, the material increased energy density by 86 percent. This work establishes a new paradigm for multifunctional polymers that integrates ion transport and energy storage, offering a versatile platform for flexible, high-energy solid-state batteries, Xinhua reported, citing the researchers.
Global Times
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