Issue 24, 2020

A self-smoothing Li-metal anode enabled via a hybrid interface film

Abstract

Li-metal is an ideal anode for high energy batteries, but uncontrollable dendrite growth restricts its practical application in rechargeable high energy batteries. To address this issue, we propose a novel strategy by constructing a hybrid interface film on Li metal. The film is formed by simply dropping a LiTFSI- and AgNO3-containing solution on Li metal, and it mainly consists of AgxLiy, Ag2S, LiF, and Li2O. These hybrid compositions provide the Li anode with a lithiophilic surface, low Li depositing/stripping overpotential and protective interface film, yielding a ‘self-spreading’ deposition behavior of Li and excellent cycling stability of Li-metal batteries. When the Li anode modified with this hybrid interface film is matched with an LFP cathode, the initial coulombic efficiency of the battery cycled at 1C at 60 °C improves from 80% to 95%, while when matched with an NCA cathode, the capacity retention of the battery improves from 36% to 73% after 500 cycles at 1C at −10 °C.

Graphical abstract: A self-smoothing Li-metal anode enabled via a hybrid interface film

Supplementary files

Article information

Article type
Paper
Submitted
27 Jan 2020
Accepted
23 May 2020
First published
25 May 2020

J. Mater. Chem. A, 2020,8, 12045-12054

A self-smoothing Li-metal anode enabled via a hybrid interface film

H. Wang, M. Liu, X. Wang, W. Zhang, Y. Che, L. Chen, Y. Wu and W. Li, J. Mater. Chem. A, 2020, 8, 12045 DOI: 10.1039/D0TA01060J

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