Issue 8, 2020

Suppressing lithium dendrite growth by a synergetic effect of uniform nucleation and inhibition

Abstract

The lithium dendrites issue presents a major challenge limiting the commercialization of Li metal anodes for high-energy-density batteries. Herein, an AgPF6–LiNO3 hybrid electrolyte additive was introduced into a carbonate electrolyte, which was found to induce the formation of a homogeneous dense layer of Ag–Li alloy seeds with small sizes on the Li metal surface. The formation mechanism of such fine Ag–Li alloy seeds on the Li metal substrate was evaluated, which revealed an interesting synergistic effect between AgPF6 and LiNO3. The occurrence of such a dense layer of Ag–Li alloy seeds was found to play a significant positive role in homogeneous nucleation and growth of Li dendrites, and LiNO3 could inhibit the growth of Li and act as a grain refiner during a repetitive plating/stripping process, thus enabling profoundly improved structural stability and excellent long-term cycle performance for the Li anode during the cycling process. With the co-presence of AgPF6–LiNO3 in the electrolyte, the relevant symmetric cells could work steadily for 3000 h with slight polarization at a density of 0.5 mA cm−2; and the Li–graphite battery can exhibit good cycle performances and deliver a specific energy density of 374 W h kg−1 at a power density of 747 W kg−1.

Graphical abstract: Suppressing lithium dendrite growth by a synergetic effect of uniform nucleation and inhibition

Supplementary files

Article information

Article type
Paper
Submitted
13 dez 2019
Accepted
21 jan 2020
First published
22 jan 2020

J. Mater. Chem. A, 2020,8, 4300-4307

Suppressing lithium dendrite growth by a synergetic effect of uniform nucleation and inhibition

L. Wu, J. Peng, F. Han, Y. Sun, T. Sheng, Y. Li, Y. Zhou, L. Huang, J. Li and S. Sun, J. Mater. Chem. A, 2020, 8, 4300 DOI: 10.1039/C9TA13644D

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