According to foreign media reports, researchers at the University of Maryland have designed a flexible lithium-ion conducting ceramic textile, which is a fast lithium-ion conductor with high electrochemical stability and scalable processing methods. , Can be integrated into solid 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, good flexibility. The team published a report in Materials Today, claiming that ceramic fiber reinforced solid polymer electrolytes , Can achieve high lithium ion conductivity, to ensure that it has a stable long-term lithium ion stability - 500 hours charge without failure.
Lithium-ion conductive ceramic fabric is a flexible material that retains the physical properties of the original template. The unique structure of the ceramic fabric can be achieved by continuous fibers and continuous fibers and yarns, solid conductors. High surface area/volume ratio, multi-level pore distribution to achieve long-range lithium ion transfer pathway.
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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 pore space between the fibers with a solid polymer electrolyte.
The process can be extended to increase the strength of the garnet ceramic electrolyte while increasing the conductivity of the hybrid ceramic/polymer lithium-ion electrolyte. In addition, the ceramic fabric is flexible and easy to cut.
The research team will continue to develop the technology and plan to make the ceramic fabric thinner so as to reduce the ion transport resistance between the electrodes. This technology will be widely used in commercial electronic devices.
