According to foreign media reports, researchers at the University of Maryland designed a flexible lithium-ion conducting ceramic textile that is a fast lithium-ion conductor with high electrochemical stability. The processing method is scalable and can be integrated into solid state lithium metal batteries.
The material is based on a garnet-type conductor and possesses many desirable chemical and structural properties including: lithium-ion conducting cubic structure, low density, multi-scale pores (multi- Scale porosity, high surface area/volume ratio, and good flexibility. The team published a report in "Materials Today," claiming that after using a ceramic fiber reinforced solid polymer electrolyte, high lithium ion conductivity can be achieved to ensure stable long-term lithium ion stability - charging 500 hours without failure.
The lithium ion conductive ceramic fabric is a flexible material that retains the physical properties of the original template. The structure of this ceramic fabric is unique, and it can realize long-range lithium ion transmission path by continuous fiber and continuous fiber and yarns, high surface area/volume ratio of solid conductor, and multi-level pore distribution.
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When designing 3D electrodes, the ceramic spinner also provides an electrolyte frame to provide ultra-high cathode load (10.8 g/cm2 sulfur) for high-performance lithium metal batteries with a battery capacity output of up to 1000 mAh/g.
In the study, the team used commercial fibers as a template to create Li-conducting garnet fiber mat textiles, filling the void space between the fibers with a solid polymer electrolyte.
This process can be extended to enhance the strength of the garnet ceramic electrolyte while increasing the electrical conductivity of the hybrid ceramic/polymer lithium-ion electrolyte. In addition, the texture of this ceramic fabric is flexible and conducive to cutting.
The research team will continue to develop the technology and plan to make the ceramic fabric thinner to reduce the ion transport tolerance between the electrodes. This technology will be widely used in commercial electronic devices.
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