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Enhanced electrochemical properties and interfacial stability of poly(ethylene oxide) solid electrolyte incorporating nanostructured Li1.3Al0.3Ti1.7(PO4)3 fillers for all solid state lithium ion batteries
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2020-12-03 , DOI: 10.1002/er.6278 Erqing Zhao 1 , Yudi Guo 2 , Yuan Xin 1 , Guangri Xu 1 , Xiaowei Guo 2
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2020-12-03 , DOI: 10.1002/er.6278 Erqing Zhao 1 , Yudi Guo 2 , Yuan Xin 1 , Guangri Xu 1 , Xiaowei Guo 2
Affiliation
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Poly(ethylene oxide) (PEO) polymer electrolyte has been regarded as a potential solid electrolyte which can be applied in all‐solid‐state lithium‐ion batteries (ASSLIBs). Nevertheless, low electrochemical properties and poor electrolyte/Li anode interfacial stability hinder its further application. In our work, the Li1.3Al0.3Ti1.7(PO4)3 (LATP) nanomaterials with Nasicon structure have been synthesized using a simple solvent‐thermal method, followed by being embedded into PEO polymer to form LATP filled PEO solid composite electrolytes. Effects of LATP content and particle size on electrochemical performances of solid electrolytes have been studied. By adjusting the calcination temperature, the uniformly distributed Nasicon‐type LATP powders with different sizes can be obtained. The electrochemical properties of PEO polymer electrolyte have been effectively enhanced by filling LATP nanoparticles. The composite electrolyte filled with 5 wt% LATP particles calcined at 850°C exhibits a high ionic conductivity of 5.24×10−4 S cm−1 at 55°C, which has a high electrochemical stability window of over 5 V versus Li/Li+ and a superior interfacial stability with Li metal. A LiFePO4/Li ASSLIB fabricated with the optimum composite electrolyte shows the excellent rate capability, and its discharge capacities at 0.2C, 0.5C, 1C, and 2C are 151.97, 151.56, 145.51, and 128.02 mAh·g−1. Moreover, the discharge capacity of the cell decreases from 151.69 to 130.53 mAh·g−1 after 100 charge‐discharge cycles at 0.5C rate, and the corresponding capacity retention is 86.05%. These results demonstrate that LATP nanoparticles obtained via the solvent‐thermal method are the alternative fillers for PEO polymer electrolyte.
中文翻译：
掺有纳米结构的Li1.3Al0.3Ti1.7（PO4）3填料的聚环氧乙烷固体电解质的电化学性能和界面稳定性增强，适用于所有固态锂离子电池
聚环氧乙烷（PEO）聚合物电解质被认为是一种潜在的固体电解质，可用于全固态锂离子电池（ASSLIB）。然而，低的电化学性能和差的电解质/锂阳极界面稳定性阻碍了其进一步的应用。在我们的工作中，Li 1.3 Al 0.3 Ti 1.7（PO 4）3具有Nasicon结构的（LATP）纳米材料已使用简单的溶剂-热方法合成，然后嵌入PEO聚合物中以形成LATP填充的PEO固体复合电解质。研究了LATP含量和粒径对固体电解质电化学性能的影响。通过调节煅烧温度，可以获得大小不一的均匀分布的Nasicon型LATP粉末。通过填充LATP纳米粒子，可以有效地增强PEO聚合物电解质的电化学性能。填充有5 wt％LATP颗粒且在850°C煅烧的复合电解质在55°C时具有5.24×10 -4 S cm -1的高离子电导率，相对于Li / Li具有5 V以上的高电化学稳定性窗口+以及与Li金属的优异界面稳定性。用最佳复合电解质制备的LiFePO 4 / Li ASSLIB显示出优异的倍率能力，其在0.2C，0.5C，1C和2C时的放电容量为151.97、151.56、145.51和128.02 mAh·g -1。此外，在0.5C速率下进行100次充放电循环后，电池的放电容量从151.69 mAh降至130.53 mAh·g -1，相应的容量保持率为86.05％。这些结果表明，通过溶剂-热法获得的LATP纳米颗粒是PEO聚合物电解质的替代填料。
更新日期：2020-12-03
中文翻译：
掺有纳米结构的Li1.3Al0.3Ti1.7（PO4）3填料的聚环氧乙烷固体电解质的电化学性能和界面稳定性增强，适用于所有固态锂离子电池
聚环氧乙烷（PEO）聚合物电解质被认为是一种潜在的固体电解质，可用于全固态锂离子电池（ASSLIB）。然而，低的电化学性能和差的电解质/锂阳极界面稳定性阻碍了其进一步的应用。在我们的工作中，Li 1.3 Al 0.3 Ti 1.7（PO 4）3具有Nasicon结构的（LATP）纳米材料已使用简单的溶剂-热方法合成，然后嵌入PEO聚合物中以形成LATP填充的PEO固体复合电解质。研究了LATP含量和粒径对固体电解质电化学性能的影响。通过调节煅烧温度，可以获得大小不一的均匀分布的Nasicon型LATP粉末。通过填充LATP纳米粒子，可以有效地增强PEO聚合物电解质的电化学性能。填充有5 wt％LATP颗粒且在850°C煅烧的复合电解质在55°C时具有5.24×10 -4 S cm -1的高离子电导率，相对于Li / Li具有5 V以上的高电化学稳定性窗口+以及与Li金属的优异界面稳定性。用最佳复合电解质制备的LiFePO 4 / Li ASSLIB显示出优异的倍率能力，其在0.2C，0.5C，1C和2C时的放电容量为151.97、151.56、145.51和128.02 mAh·g -1。此外，在0.5C速率下进行100次充放电循环后，电池的放电容量从151.69 mAh降至130.53 mAh·g -1，相应的容量保持率为86.05％。这些结果表明，通过溶剂-热法获得的LATP纳米颗粒是PEO聚合物电解质的替代填料。
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