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A Lithium Amide-Borohydride Solid-State Electrolyte with Lithium-Ion Conductivities Comparable to Liquid Electrolytes

机译:锂离子电导率可与液体电解质媲美的酰胺化硼氢化物固态电解质

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摘要

High ionic conductivity of up to 6.4 x 10(-3) S cm(-1) near room temperature (40 degrees C) in lithium amide-borohydrides is reported, comparable to values of liquid organic electrolytes commonly employed in lithium-ion batteries. Density functional theory is applied coupled with X-ray diffraction, calorimetry, and nuclear magnetic resonance experiments to shed light on the conduction mechanism. A Li4Ti5O12 half-cell battery incorporating the lithium amide-borohydride electrolyte exhibits good rate performance up to 3.5 mA cm(-2) (5 C) and stable cycling over 400 cycles at 1 C at 40 degrees C, indicating high bulk and interfacial stability. The results demonstrate the potential of lithium amide-borohydrides as solid-state electrolytes for high-power lithium-ion batteries.
机译:据报道,在室温(40摄氏度)下,酰胺化硼氢化锂中的高离子电导率高达6.4 x 10(-3)S cm(-1),可与锂离子电池中常用的液态有机电解质相比。密度泛函理论与X射线衍射,量热法和核磁共振实验相结合,揭示了传导机理。结合了酰胺化硼氢化锂电解质的Li4Ti5O12半电池显示出高达3.5 mA cm(-2)(5 C)的良好速率性能,并在40°C下于1 C进行了400次循环稳定循环,这表明它具有很高的体积和界面稳定性。结果证明了酰胺化硼氢化锂作为高功率锂离子电池固态电解质的潜力。

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