高等学校化学学报 ›› 2023, Vol. 44 ›› Issue (5): 20220703.doi: 10.7503/cjcu20220703

• 综合评述 • 上一篇    

固态电解质锂离子输运机制研究进展

富忠恒1, 陈翔1, 姚楠1, 余乐耕1, 沈馨1, 张睿2, 张强1()   

  1. 1.清华大学化学工程系, 北京 100084
    2.北京理工大学前沿交叉科学研究院, 北京 100081
  • 收稿日期:2022-11-07 出版日期:2023-05-10 发布日期:2023-01-04
  • 通讯作者: 张强 E-mail:zhang-qiang@mails.tsinghua.edu.cn
  • 基金资助:
    国家重点研发计划项目(2021YFB2500300);北京市自然科学基金(Z200011);国家自然科学基金(22109086);中国博士后科学基金(2021TQ0161);清华国强研究院基金(2020GQG1006)

Research Advances in Transport Mechanism of Lithium Ions in Solid Electrolytes

FU Zhongheng1, CHEN Xiang1, YAO Nan1, YU Legeng1, SHEN Xin1, ZHANG Rui2, ZHANG Qiang1()   

  1. 1.Department of Chemical Engineering,Tsinghua University,Beijing 100084,China
    2.Advanced Research Institute of Multidisciplinary Science,Beijing Institute of Technology,Beijing 100081,China
  • Received:2022-11-07 Online:2023-05-10 Published:2023-01-04
  • Contact: ZHANG Qiang E-mail:zhang-qiang@mails.tsinghua.edu.cn
  • Supported by:
    the National Key Research and Development Program, China(2021YFB2500300);the Beijing Municipal Natural Science Foundation, China(Z200011);the National Natural Science Foundation of China(22109086);the China Postdoctoral Science Foundation(2021TQ0161);the Foundation of Guoqiang Institute at Tsinghua University Foundation of China(2020GQG1006)

摘要:

全球环境问题推动了可充电锂电池技术的飞速发展. 与液态电解液相比, 固态电解质不易燃, 构筑所得固态电池的安全性能得以提升. 如果能够理解固态电解质中的离子输运行为, 就能精准调控固态电池锂的动力学稳定性和倍率性能. 随着计算机技术的快速发展, 原子尺度模拟技术成为理解材料离子输运的重要手段. 针对以上问题, 本综合评述首先汇总了固体材料中的常见扩散机制; 然后介绍了固态电解质中的锂离子输运机制, 着重讨论了影响固态电解质锂离子输运的重要因素(晶体结构、 电子结构、 外部因素及晶界); 最后对固态电解质锂离子输运机制研究进行了总结与展望.

关键词: 固态电池, 固态电解质, 密度泛函理论计算, 分子动力学模拟

Abstract:

Global challenges have promoted the rapid development of rechargeable lithium battery technology. Solid-state electrolytes are less flammable than liquid electrolytes. If the ion transport behavior in solid electrolytes is well understood, the lithium dynamic stability and rate performance of solid state batteries can be accurately regulated. With the rapid development of calculation technology, atomic scale simulation technology has become an important method to understand the ion transport of materials. To solve the above problems, this review firstly summarizes the common diffusion mechanisms in solid materials. Then the transport mechanism of lithium ions in solid electrolytes is introduced, and the important factors(crystal structure, electronic structure, external factors, grain boundaries) affecting the transport of lithium ions in solid electrolytes are emphatically included. Finally, the transport mechanism of lithium ion in solid electrolytes is summarized and prospected.

Key words: Solid-state battery, Solid electrolyte, Density functional theory calculation, Molecular dynamics simulation

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