Issue 35, 2021

Formation mechanism of the solid electrolyte interphase in different ester electrolytes

Abstract

The solid electrolyte interphase (SEI) plays a critical role in determining the performance of lithium metal batteries. Herein, the formation mechanisms of the SEI is investigated in electrolytes with two frequently adopted solvents: diethyl carbonate (DEC) and ethylene carbonate (EC). The dispersity of reaction products between Li and solvents are explored by 1H-NMR and first-principles calculations. Lithium ethylene carbonate (LEC), the reduction product of DEC, disperses in the electrolyte, while lithium ethylene dicarbonate (LEDC), the reduction product of EC, cannot disperse in the electrolyte. First-principles calculations further prove that the low polymerization degree of (LEC)n leads to its good dispersity, while poly-LEDC macromolecules can remain on the Li surface acting as the stable SEI. This work not only clearly points out the formation mechanism of SEI, but also demonstrates the functional role of EC, which can provide novel insights for electrolyte design of advanced batteries.

Graphical abstract: Formation mechanism of the solid electrolyte interphase in different ester electrolytes

Supplementary files

Article information

Article type
Communication
Submitted
30 mar 2021
Accepted
19 mai 2021
First published
19 mai 2021

J. Mater. Chem. A, 2021,9, 19664-19668

Formation mechanism of the solid electrolyte interphase in different ester electrolytes

S. Yang, N. Yao, X. Xu, F. Jiang, X. Chen, H. Liu, H. Yuan, J. Huang and X. Cheng, J. Mater. Chem. A, 2021, 9, 19664 DOI: 10.1039/D1TA02615A

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