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Composite Solid Electrolytes with NASICON-Type LATP and PVdF–HFP for Solid-State Lithium Batteries
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-01-14 , DOI: 10.1021/acs.iecr.0c05075 Yang Li 1, 2 , Hui Wang 1, 2
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-01-14 , DOI: 10.1021/acs.iecr.0c05075 Yang Li 1, 2 , Hui Wang 1, 2
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Utilizing Li-ion conductors as solid electrolytes is essential in solid-state lithium (Li) batteries (SSLBs), which is a promising solution for the next-generation electrochemical energy storage systems that require high energy and high levels of safety. Among various Li-ion conductors, Li1.5Al0.5Ti1.5(PO4)3 (LATP), a NASICON-type ceramic, has attracted intensive attention due to its advantages of air stability and fast Li+ conductivity. However, to reach a decent ionic conductivity and reduce grain boundary resistance, LATP requires high temperatures for densification, which is time-consuming and expensive for large-scale applications. Herein, we report a simple solution-casting synthesis for new composite solid electrolytes by embedding LATP ceramic into a PVdF–HFP matrix. In the LATP/PVdF–HFP composite solid membranes, the NASICON-type crystal structure of LATP is well maintained. Without taking any additional liquid electrolyte absorption, the prepared composite solid electrolytes with 10 wt % LATP show the highest ionic conductivity of 2.3 × 10–4 S cm–1 at room temperature, three times higher than that of polymer electrolyte (7.1 × 10–5 S cm–1). In addition, the Li||LiFePO4 (LFP) battery with LATP/PVdF–HFP composite electrolyte exhibits enhanced cycling performance of both capacity and stability as compared to the polymer electrolyte-based battery.
中文翻译：
NASICON型LATP和PVdF–HFP的复合固体电解质，用于固态锂电池
固态锂（Li）电池（SSLB）中必不可少的是使用锂离子导体作为固体电解质，对于需要高能量和高安全性的下一代电化学储能系统而言，这是一个有前途的解决方案。在各种锂离子导体中，NASICON型陶瓷Li 1.5 Al 0.5 Ti 1.5（PO 4）3（LATP）由于其空气稳定性和快速的Li +优势而备受关注。电导率。然而，为了达到合适的离子电导率并降低晶界电阻，LATP需要高温进行密实化，这对于大型应用而言既费时又昂贵。在这里，我们报告了一种通过将LATP陶瓷嵌入PVdF–HFP基质中来对新型复合固体电解质进行简单的溶液浇铸合成的方法。在LATP / PVdF-HFP复合固体膜中，可以很好地保持LATP的NASICON型晶体结构。无需额外吸收液体电解质，所制备的具有10 wt％LATP的复合固体电解质在室温下的最高离子电导率为2.3×10 –4 S cm –1，是聚合物电解质（7.1×10 – 4 – 5 S厘米–1）。此外，与基于聚合物电解质的电池相比，具有LATP / PVdF-HFP复合电解质的Li || LiFePO 4（LFP）电池具有更高的容量和稳定性循环性能。
更新日期：2021-01-27
中文翻译：
NASICON型LATP和PVdF–HFP的复合固体电解质，用于固态锂电池
固态锂（Li）电池（SSLB）中必不可少的是使用锂离子导体作为固体电解质，对于需要高能量和高安全性的下一代电化学储能系统而言，这是一个有前途的解决方案。在各种锂离子导体中，NASICON型陶瓷Li 1.5 Al 0.5 Ti 1.5（PO 4）3（LATP）由于其空气稳定性和快速的Li +优势而备受关注。电导率。然而，为了达到合适的离子电导率并降低晶界电阻，LATP需要高温进行密实化，这对于大型应用而言既费时又昂贵。在这里，我们报告了一种通过将LATP陶瓷嵌入PVdF–HFP基质中来对新型复合固体电解质进行简单的溶液浇铸合成的方法。在LATP / PVdF-HFP复合固体膜中，可以很好地保持LATP的NASICON型晶体结构。无需额外吸收液体电解质，所制备的具有10 wt％LATP的复合固体电解质在室温下的最高离子电导率为2.3×10 –4 S cm –1，是聚合物电解质（7.1×10 – 4 – 5 S厘米–1）。此外，与基于聚合物电解质的电池相比，具有LATP / PVdF-HFP复合电解质的Li || LiFePO 4（LFP）电池具有更高的容量和稳定性循环性能。
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