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Low-Temperature ceramic-polymer nanocomposite solid state electrolyte
Low-Temperature ceramic-polymer nanocomposite solid state electrolyte
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机译:低温陶瓷 - 聚合物纳米复合材料固态电解质
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摘要
Ceramic-polymer film includes a polymer matrix, plasticizers, a lithium salt, and a ceramic nanoparticle, LLZO: AlxLi7-xLa3Zr1.75Ta0.25O12 where x ranges from 0 to 0.85. The nanoparticles have diameters that range from 20 to 2000 nm and the film has an ionic conductivity of greater than 1×10−4 S/cm (−20° C. to 10° C.) and larger than 1×10−3 S/cm (≥20° C.). Using a combination of selected plasticizers to tune the ionic transport temperature dependence enables the battery based on the ceramic-polymer film to be operable in a wide temperature window (−40° C. to 90° C.). Large size nanocomposite film (area ≥8 cm×6 cm) can be formed on a substrate and the concentration of LLZO nanoparticles decreases in the direction of the substrate to form a concentration gradient over the thickness of the film. This large size film can be employed as a non-flammable, solid-state electrolyte for lithium electrochemical pouch cell and further assembled into battery packs.
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机译:陶瓷 - 聚合物膜包括聚合物基质,增塑剂,锂盐和陶瓷纳米粒子,LLZO:Al X / Si Li 7-x sub> La 3 sub > Zr 1.75 sub> ta 0.25 sub> O 12 sub>其中x范围为0至0.85。纳米颗粒的直径为20至2000nm,薄膜的离子电导率大于1×10 -4 / cm(-20℃至10℃)和更大超过1×10 -3 sup> s / cm(≥20°C)。使用所选增塑剂的组合来调谐离子传输温度依赖性,使得基于陶瓷聚合物膜的电池能够在宽温度窗口(-40℃至90℃)中可操作。在基板上可以形成大尺寸的纳米复合膜(面积≥8cm×6cm),并且LLZO纳米颗粒的浓度在基板的方向上降低,以在薄膜的厚度上形成浓度梯度。该大尺寸薄膜可用作锂电化袋电池的不易燃固态电解质,并进一步组装到电池组中。
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