Issue 8, 2021

High-performance magnesium metal batteries via switching the passivation film into a solid electrolyte interphase

Abstract

Magnesium-ion batteries have been regarded as a promising alternative to the lithium-ion batteries due to their high theoretical capacity, relatively high potential, and magnesium abundance. However, the contradiction between the plating/stripping of Mg2+ and the electrolytes’ oxidative stability has hampered the Mg-ion battery's development for energy storage applications. Here, we designed an amorphous MgO-wrapped Zn-skeleton as a unique current collector for an anode-free Mg battery to allow reversible Mg2+ plating/stripping in oxidatively stable electrolytes. The significant lattice mismatch between hexagonal Zn and MgO induces dislocations, leading to a highly defective interphase. This layer behaves as a mixed ionic-electronic conductor, rendering Mg nanoparticles upon electroplating. Combined with a large surface area, the proposed current collector considerably improved the charge transfer kinetics and lowered the cell impedance for Mg2+ plating/stripping by 1/20 of the typical Mg metal. Moreover, the Mg2+ interphase conduction was two orders of magnitude higher (∼10−11 S cm−1) compared to the widely known passivating layer (<10−13 S cm−1). This special design enables Mg–Li hybrid batteries with non-corrosive electrolytes to exhibit a high-operating-voltage of 2.82 V vs. Mg/Mg2+ and an energy density of 412.5 W h kg−1.

Graphical abstract: High-performance magnesium metal batteries via switching the passivation film into a solid electrolyte interphase

Supplementary files

Article information

Article type
Communication
Submitted
26 Feb 2021
Accepted
22 Jun 2021
First published
22 Jun 2021

Energy Environ. Sci., 2021,14, 4391-4399

Author version available

High-performance magnesium metal batteries via switching the passivation film into a solid electrolyte interphase

J. Bae, H. Park, X. Guo, X. Zhang, J. H. Warner and G. Yu, Energy Environ. Sci., 2021, 14, 4391 DOI: 10.1039/D1EE00614B

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