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首页> 外文期刊>Journal of Energy Storage >PEO/LAGP hybrid solid polymer electrolytes for ambient temperature lithium batteries by solvent-free, 'one pot' preparation
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PEO/LAGP hybrid solid polymer electrolytes for ambient temperature lithium batteries by solvent-free, 'one pot' preparation

机译：PEO / LAGP混合型固态聚合物电解质，用于环境锂电池，无溶剂，“一锅法”制备

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Here, we report hybrid solid polymer electrolytes (HSPE) obtained by rapid, truly solvent-free, thus scalable preparation process. HSPE composition is very simple: a LiTFSI added poly(ethylene oxide) (PEO) polymer matrix encompassing NASICON-type Li1.5Al0.5Ge1.5(PO4)(3) (LAGP) super Li+ ion conducing ceramic. Homogeneous, self-standing, mechanically robust solid electrolyte films are obtained by simply mixing in "one pot" and hot pressing the solid mixture of dry powders at moderate temperature. Noteworthy, unlike several other super ionic conductors used for composite electrolytes, LAGP is relatively stable in air atmosphere and can be processed in a dry-room, which is more favorable, cheap and scalable than Ar-filled dry glove box for industrial fabrication of safe lithium batteries. The proper, homogeneous mixing of LAGP powder, PEO and LiTFSI leads to HSPE with interesting electrochemical behavior in lab-scale lithium cells, especially under high current regimes, and even at ambient temperature. HSPE-based cells outperform the PEO-LiTFSI-based counterpart, in terms of specific capacity output (about 70% of the theoretical value retained at very high 2C rate), limited fading and excellent Coulombic efficiency ( > 99.5%) even at low rate. Interfacial stability issues remain to be solved, chiefly linked to the reactivity of LAGP in contact with lithium metal, but results here proposed represent a step further toward truly all-solid-state batteries conceived for high energy/power technologies, assuring safety and performance in a wide range of operating conditions.
机译：在这里，我们报告了通过快速，真正无溶剂，因而可扩展的制备工艺获得的混合固体聚合物电解质（HSPE）。 HSPE的组成非常简单：添加了LiTFSI的聚（环氧乙烷）（PEO）聚合物基体，其中包含NASICON型Li1.5Al0.5Ge1.5（PO4）（3）（LAGP）超Li +离子导电陶瓷。均质，自立，机械坚固的固体电解质膜可通过在“一锅”中简单混合并在中等温度下热压干粉的固体混合物而获得。值得注意的是，与用于复合电解质的其他几种超离子导体不同，LAGP在空气中相对稳定，可以在干燥室内进行处理，这比填充Ar的干式手套箱更有利，便宜且可扩展，可安全地进行工业制造。锂电池。 LAGP粉，PEO和LiTFSI的正确，均匀混合会导致HSPE在实验室规模的锂电池中具有令人感兴趣的电化学行为，尤其是在大电流条件下，甚至在环境温度下。基于HSPE的电池在比容量输出（在非常高的2C速率下保持约70％的理论值），有限的褪色和出色的库仑效率（> 99.5％）方面甚至优于基于PEO-LiTFSI的同类产品。 。界面稳定性问题尚待解决，主要与与锂金属接触的LAGP的反应性有关，但此处提出的结果代表了朝着真正为高能量/功率技术设想的全固态电池迈出的一步，以确保电池的安全性和性能。广泛的工作条件。

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