储能科学与技术 ›› 2024, Vol. 13 ›› Issue (1): 178-192.doi: 10.19799/j.cnki.2095-4239.2023.0784

• 高比能二次电池关键材料与先进表征专刊 • 上一篇    下一篇

固体核磁共振技术解析固态电池离子输运机制研究进展

李宇航(), 韩卓, 安旭飞, 张丹丰, 郑国瑞, 柳明(), 贺艳兵()   

  1. 清华大学深圳国际研究生院,材料研究院,广东 深圳 518055
  • 收稿日期:2023-11-01 修回日期:2023-11-06 出版日期:2024-01-05 发布日期:2024-01-22
  • 通讯作者: 柳明,贺艳兵 E-mail:l-yh23@mails.tsinghua.edu.cn;liuming@sz.tsinghua.edu.cn;he.yanbing@sz.tsinghua.edu.cn
  • 作者简介:李宇航(1998—),男,博士研究生,研究方向为固态电解质,E-mail:l-yh23@mails.tsinghua.edu.cn
  • 基金资助:
    国家自然科学联合基金(U2001220);国家自然科学基金(52203298)

Progress of ion transport in solid-state battery research based on solid state nuclear magnetic resonance

Yuhang LI(), Zhuo HAN, Xufei AN, Danfeng ZHANG, Guorui ZHENG, Ming LIU(), Yanbing HE()   

  1. Institute of Materials Research (iMR), Tsinghua Shenzhen International Graduate School, Shenzhen 518055, Guangdong, China
  • Received:2023-11-01 Revised:2023-11-06 Online:2024-01-05 Published:2024-01-22
  • Contact: Ming LIU, Yanbing HE E-mail:l-yh23@mails.tsinghua.edu.cn;liuming@sz.tsinghua.edu.cn;he.yanbing@sz.tsinghua.edu.cn

摘要:

关键词: 固态电池, 界面, 离子迁移, 固体核磁共振

Abstract:

Solid-state batteries are the most promising next-generation batteries due to their high-energy density and safety features. The ionic conductivity of solid electrolytes and the interface of solid-state batteries play crucial roles in determining their electrochemical performance. However, intrinsic ion migration across interfaces poses a challenge for achieving optimal electrochemical performance. Owing to the limitations of state-of-the-art characterization methods, it is difficult to analyze Li+ transport across interfaces in solid-state batteries. Solid-state nuclear magnetic resonance (ssNMR) can be used to provide an invasive analysis of local structures and a quantitative study of ion transport, making it an important tool for solid-state battery research. This review summarizes recent studies by our team and other groups that have used ssNMR to study solid electrolytes and the electrode-electrolyte interface. Starting with an overview of the current obstacles in the development of solid-state batteries, this review provides a concise summary of universal ssNMR methods used in battery research. The key factors affecting the ionic conductivity of the solid electrolyte were analyzed, focusing on the grain boundaries, interfacial structures, and ion-diffusion pathways. This review also focuses on understanding the failure process between solid electrolytes and electrodes, and summarizes some modification methods that can contribute to the development of stable interfaces in solid-state batteries. Furthermore, this review provides a comprehensive summary of the role of space charges at solid electrolyte-electrode interfaces, which are key factors affecting the electrochemical performance of solid-state batteries. Finally, this review discusses future challenges, perspectives, and potential for further studies using ssNMR in the field of solid-state batteries.

Key words: solid-state battery, interface, ion transport, solid-state nuclear magnetic resonance

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