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Dynamic Visualization of Cathode/Electrolyte Evolution in Quasi-Solid-State Lithium Batteries

机译：准固态锂电池中阴极/电解质演化的动态可视化

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摘要

Solid-state lithium-sulfur batteries (SSLSBs) are highly appealing for electrochemical energy devices because of their promising theoretical energy density. An intensive acquaintance of SSLS interfacial behavior is of importance in gaining fundamental knowledge of working/failure mechanisms and clarifying further optimized design of advanced batteries. Herein, a direct visualization of the evolution of both component and structure is present inside a working SSLSB. In situ Raman spectroscopy clearly sheds light on the potential-dependent evolution of sulfur speciation via subtly fabricating the electrochemical cell. Moreover, the real-time optical microscopic views show that the irreversible structure deformation of solid-state electrolytes (SSEs), which results from the decomposition of dissolved polysulfides (PSs) and gas generation inside the SSE, directly causes the fracture of sulfur cathode with the cycling times increasing. Furthermore, by an atomic force microscopy study, the evolving structure and dynamic behavior of SSEs are directly captured at the nano/microscale and further elucidate the PS shuttling determining the mechanism stability of electrolyte. This work provides a straightforward monitoring of the compositional and morphological evolution, which contributes one to exploring the failure mechanisms and interfacial reactions for the cell performance enhancement.
机译：固态锂 - 硫磺电池（SSLSBS）对于电化学能量装置非常吸引力，因为它们具有很有希望的理论能量密度。 SSLS界面行为的强烈熟悉在获得工作/失效机制的基础知识并澄清进一步优化的先进电池设计方面是重要的。这里，在工作SSLSB内部存在两种组分和结构的演化的直接可视化。原位拉曼光谱清晰地通过细线制造电化学电池来清除硫形态的潜在依赖性演化。此外，实时光学微观视图表明固态电解质（SSE）的不可逆结构变形，从SSE内部的溶解多硫化物（PSS）和气体产生的分解产生的，直接导致硫阴极的骨折循环时间增加。此外，通过原子力显微镜研究，SSE的不断发展结构和动态行为在纳米/微尺寸上直接捕获，进一步阐明PS梭子确定电解质的机构稳定性。这项工作提供了对组成和形态学的直接监测，这有助于探索细胞性能增强的失效机制和界面反应。

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  • 来源
    《Advanced energy materials》 |2020年第25期|2000465.1-2000465.8|共8页
  • 作者

    Song Yue-Xian; Shi Yang; Wan Jing; Liu Bing; Wan Li-Jun; Wen Rui;

  • 作者单位

    Chinese Acad Sci ICCAS Beijing Natl Lab Mol Sci BNLMS Inst Chem CAS Res Educ Ctr Excellence Mol Sci Key Lab Mol N Beijing 100190 Peoples R China|Univ Chinese Acad Sci Beijing 100049 Peoples R China;

    Chinese Acad Sci ICCAS Beijing Natl Lab Mol Sci BNLMS Inst Chem CAS Res Educ Ctr Excellence Mol Sci Key Lab Mol N Beijing 100190 Peoples R China|Univ Chinese Acad Sci Beijing 100049 Peoples R China;

    Chinese Acad Sci ICCAS Beijing Natl Lab Mol Sci BNLMS Inst Chem CAS Res Educ Ctr Excellence Mol Sci Key Lab Mol N Beijing 100190 Peoples R China|Univ Chinese Acad Sci Beijing 100049 Peoples R China;

    Univ Chinese Acad Sci Beijing 100049 Peoples R China|Chinese Acad Sci ICCAS Beijing Natl Lab Mol Sci BNLMS Inst Chem State Key Lab Polymer Phys & Chem CAS Res Educ Ct Beijing 100190 Peoples R China;

    Chinese Acad Sci ICCAS Beijing Natl Lab Mol Sci BNLMS Inst Chem CAS Res Educ Ctr Excellence Mol Sci Key Lab Mol N Beijing 100190 Peoples R China|Univ Chinese Acad Sci Beijing 100049 Peoples R China;

    Chinese Acad Sci ICCAS Beijing Natl Lab Mol Sci BNLMS Inst Chem CAS Res Educ Ctr Excellence Mol Sci Key Lab Mol N Beijing 100190 Peoples R China|Univ Chinese Acad Sci Beijing 100049 Peoples R China;

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

    dynamic visualization; evolution processes; in situ atomic force microscopy; optical imaging; solid-state lithium-sulfur batteries;

    机译：动态可视化;进化过程;在原子原子力显微镜;光学成像;固态锂 - 硫磺电池;

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