Issue 12, 2024

Revealing unprecedented cathode interface behavior in all-solid-state batteries with oxychloride solid electrolytes

Abstract

All-solid-state lithium batteries (ASSLBs) are highly desirable for their sustainability, enhanced safety, and increased energy densities. The compatibility between cathodes and solid electrolytes (SEs) is critical for ASSLB electrochemical performance. While the conventional LiCoO2 (LCO) cathode shows structural stability, limitations in the energy density and materials cost prompt exploration of Ni-rich, Co-poor cathodes like lithium nickel cobalt manganese oxide (NCM). However, Ni-rich NCM faces challenges with typical solid electrolytes (e.g., sulfides or oxides), hindering high-energy-density ASSLBs. Our study reveals a unique cathode/electrolyte interface behavior with lithium tantalum oxychloride (LTOC) superionic conductors, favoring Co-less, Ni-rich NCM over LCO. The Ta/Co interaction is identified as a failure mechanism for LTOC/LCO, while a kinetically stabilized interface is achieved with lean-Co cathodes. Beyond the cathode material composition, our study also establishes a correlation between the temperature used for battery testing and both interface reactivity and cell performance. This research provides crucial insights into the innovative design of high-performance ASSLBs based on the promising LTOC oxychloride SEs.

Graphical abstract: Revealing unprecedented cathode interface behavior in all-solid-state batteries with oxychloride solid electrolytes

Supplementary files

Article information

Article type
Paper
Submitted
17 Feb 2024
Accepted
03 Apr 2024
First published
04 Apr 2024

Energy Environ. Sci., 2024,17, 4055-4063

Revealing unprecedented cathode interface behavior in all-solid-state batteries with oxychloride solid electrolytes

F. Zhao, S. Zhang, S. Wang, C. M. Andrei, H. Yuan, J. Zhou, J. Wang, Z. Zhuo, Y. Zhong, H. Su, J. T. Kim, R. Yu, Y. Gao, J. Guo, T. Sham, Y. Mo and X. Sun, Energy Environ. Sci., 2024, 17, 4055 DOI: 10.1039/D4EE00750F

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements