Issue 7, 2020

Towards high rate Li metal anodes: enhanced performance at high current density in a superconcentrated ionic liquid

Abstract

Although high energy density and fast charging rates are vital for future advanced battery applications such as electric vehicles (EVs), the impact of fast charge rates is not widely investigated for key technologies such as those based on lithium metal. Here, for the first time, Li metal deposition/dissolution in a superconcentrated ionic liquid (IL) is demonstrated at the high current densities necessary for fast charge technologies. Operation at high current is shown to enhance the cycling efficiency from 64 ± 3% at 1 mA cm−2 up to 96 ± 1% at 20 mA cm−2 on a bare Ni substrate, providing a new path to enable these technologies. XPS, ToF-SIMS and SEM measurements revealed that a stable and LiF-dominated SEI, favourable nucleation and compact dendrite-free Li morphology enabled enhanced cycling efficiency at higher currents.

Graphical abstract: Towards high rate Li metal anodes: enhanced performance at high current density in a superconcentrated ionic liquid

Supplementary files

Article information

Article type
Communication
Submitted
01 11月 2019
Accepted
29 11月 2019
First published
03 12月 2019

J. Mater. Chem. A, 2020,8, 3574-3579

Towards high rate Li metal anodes: enhanced performance at high current density in a superconcentrated ionic liquid

K. Periyapperuma, E. Arca, S. Harvey, C. Ban, A. Burrell, D. R. MacFarlane, C. Pozo-Gonzalo, M. Forsyth and P. C. Howlett, J. Mater. Chem. A, 2020, 8, 3574 DOI: 10.1039/C9TA12004A

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