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首页> 外文期刊>Advanced energy materials >Stable Seamless Interfaces and Rapid Ionic Conductivity of Ca–CeO_2/LiTFSI/PEO Composite Electrolyte for High-Rate and High-Voltage All-Solid-State Battery
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Stable Seamless Interfaces and Rapid Ionic Conductivity of Ca–CeO_2/LiTFSI/PEO Composite Electrolyte for High-Rate and High-Voltage All-Solid-State Battery

机译：CA-CEO_2 / LITFSI / PEO复合电解液的稳定无缝界面和快速离子电导率，用于高速速率和高压全固态电池

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摘要

Stable and seamless interfaces among solid components in all-solid-state batteries (ASSBs) are crucial for high ionic conductivity and high rate performance. This can be achieved by the combination of functional inorganic material and flexible polymer solid electrolyte. In this work, a flexible all-solid-state composite electrolyte is synthesized based on oxygen-vacancy-rich Ca-doped CeO2 (Ca-CeO2) nanotube, lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), and poly(ethylene oxide) (PEO), namely Ca-CeO2/LiTFSI/PEO. Ca-CeO2 nanotubes play a key role in enhancing the ionic conductivity and mechanical strength while the PEO offers flexibility and assures the stable seamless contact between the solid electrolyte and the electrodes in ASSBs. The as-prepared electrolyte exhibits high ionic conductivity of 1.3 x 10(-4) S cm(-1) at 60 degrees C, a high lithium ion transference number of 0.453, and high-voltage stability. More importantly, various electrochemical characterizations and density functional theory (DFT) calculations reveal that Ca-CeO2 helps dissociate LiTFSI, produce free Li ions, and therefore enhance ionic conductivity. The ASSBs based on the as-prepared Ca-CeO2/LiTFSI/PEO composite electrolyte deliver high-rate capability and high-voltage stability.
机译：全固态电池（ASSB）中的固体组件中的稳定和无缝界面对于高离子电导率和高速率性能至关重要。这可以通过功能性无机材料和柔性聚合物固体电解质的组合来实现。在这项工作中，基于富氧空位的Ca-Doped CeO2（Ca-CeO2）纳米管，锂双（三氟甲磺酰基）酰亚胺（LitFSI）和聚（环氧乙烷）（ PEO），即CA-CEO2 / LITFSI / PEO。 CA-CEO2纳米管在提高离子电导率和机械强度方面发挥关键作用，而PEO提供柔韧性并确保ASSB中的固体电解质和电极之间的稳定无缝接触。当制备的电解质在60℃下表现出1.3×10（-4）厘米（-1）的高离子电导率，高锂离子转移数为0.453，高压稳定性。更重要的是，各种电化学表征和密度泛函理论（DFT）计算表明CA-CeO2有助于解离LITFSI，产生游离的Li离子，因此提高离子电导率。基于AS制备的CA-CEO2 / LITFSI / PEO复合电解液提供高速能力和高压稳定性的ASSB。

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  • 来源
    《Advanced energy materials》 |2020年第21期|2000049.1-2000049.13|共13页
  • 作者

    Chen Hao; Adekoya David; Hencz Luke; Ma Jun; Chen Su; Yan Cheng; Zhao Huijun; Cui Guanglei; Zhang Shanqing;

  • 作者单位

    Griffith Univ Ctr Clean Environm & Energy Gold Coast Qld 4222 Australia;

    Griffith Univ Ctr Clean Environm & Energy Gold Coast Qld 4222 Australia;

    Griffith Univ Ctr Clean Environm & Energy Gold Coast Qld 4222 Australia;

    Chinese Acad Sci Qingdao Inst Bioenergy & Bioproc Technol Qingdao Ind Energy Storage Res Inst Qingdao 266101 Peoples R China;

    Queensland Univ Technol Sch Chem Phys & Mech Engn Brisbane Qld 64001 Australia;

    Queensland Univ Technol Sch Chem Phys & Mech Engn Brisbane Qld 64001 Australia;

    Griffith Univ Ctr Clean Environm & Energy Gold Coast Qld 4222 Australia;

    Chinese Acad Sci Qingdao Inst Bioenergy & Bioproc Technol Qingdao Ind Energy Storage Res Inst Qingdao 266101 Peoples R China;

    Griffith Univ Ctr Clean Environm & Energy Gold Coast Qld 4222 Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    all-solid-state batteries; CeO; (2) nanotubes; lithium ion batteries;

    机译：全固态电池;首席执行官;（2）纳米管;锂离子电池;

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