Energy Storage Science and Technology ›› 2024, Vol. 13 ›› Issue (1): 178-192.doi: 10.19799/j.cnki.2095-4239.2023.0784

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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

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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