Reversible Magnesium Metal Anode Enabled by Cooperative Solvation/Surface Engineering in Carbonate Electrolytes

Wang, Caiyun, Huang, Yao, Lu, Yunhao, Pan, Hongge, Xu, Bin, Sun, Wenping, Yan, Mi and Jiang, Yinzhu (2021) Reversible Magnesium Metal Anode Enabled by Cooperative Solvation/Surface Engineering in Carbonate Electrolytes. Nano-Micro Letters, 13 (1). p. 195. ISSN 2311-6706

[img]
Preview
Text
Wang2021_Article_ReversibleMagnesiumMetalAnodeE.pdf - Published Version
Available under License Creative Commons Attribution 4.0.

Download (3MB) | Preview
[img]
Preview
Text
NML_Manuscript_R1_Clean.pdf - Accepted Version
Available under License Creative Commons Attribution 4.0.

Download (1MB) | Preview
Official URL: https://doi.org/10.1007/s40820-021-00716-1

Abstract

Magnesium metal anode holds great potentials towards future high energy and safe rechargeable magnesium battery technology due to its divalent redox and dendrite-free nature. Electrolytes based on Lewis acid chemistry enable the reversible Mg plating/stripping, while they fail to match most cathode materials toward high voltage magnesium batteries. Herein, reversible Mg plating/stripping is achieved in conventional carbonate electrolytes enabled by the cooperative solvation/surface engineering. Strongly electronegative Cl from the MgCl2 additive of electrolyte impairs the Mg...O=C interaction to reduce the Mg2+ desolvation barrier for accelerated redox kinetics, while the Mg2+-conducting polymer coating on the Mg surface ensures the facile Mg2+ migration and the effective isolation of electrolytes. As a result, reversible plating and stripping of Mg is demonstrated with a low overpotential of 0.7 V up to 2000 cycles. Moreover, benefitting from the wide electrochemical window of carbonate electrolytes, high voltage (>2.0 V) rechargeable magnesium batteries are achieved through assembling the electrode couple of Mg metal anode and Prussian blue-based cathodes. The present work provides a cooperative engineering strategy to promote the application of magnesium anode in carbonate electrolytes toward high energy rechargeable batteries.

Item Type: Article
Uncontrolled Keywords: Rechargeable magnesium batteries, Metal anode, Solvation effect, Passivation, Carbonate electrolytes
Subjects: H800 Chemical, Process and Energy Engineering
H900 Others in Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Rachel Branson
Date Deposited: 18 Aug 2021 14:14
Last Modified: 16 Sep 2021 08:00
URI: http://nrl.northumbria.ac.uk/id/eprint/46938

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics