Stability of current collectors against corrosion in apc electrolyte for rechargeable Mg battery

Sankalpita Chakrabarty, J. Alberto Blázquez, Tali Sharabani, Ananya Maddegalla, Olatz Leonet, Idoia Urdampilleta, Daniel Sharon, Malachi Noked, Ayan Mukherjee

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Rechargeable magnesium batteries (RMBs) are highly attractive due to their high volumetric capacity, relatively low cost, and enhanced safety. Significant progress in the development of RMBs was the introduction of nonaqueous electrolyte solutions that enable reversible electrodeposition of Mg metal. These solutions contain a unique mixture of organo-aluminum and chloro -aluminum species. While these solutions are shown to be stable during cathodic polarization, the presence of chlorine anions in the solution can promote the corrosion process during the anodic polarization. Among all the cell components, the cathode current collector is most prone to corrosive processes. In this study, we characterize the corrosion behavior of different metallic current collectors in standard APC (All-Phenyl Complex) electrolyte solutions by following their electrochemical response and surface morphology changes during anodic polarization. In addition, we investigate the influence of carbon coating on the corrosive behavior of Ni metal. The study shows the efficacy of carbon coating on the current collector. We demonstrate that Ni@C current collector possesses higher corrosion pit initiation potential (2.25 V vs Mg/Mg2+) with respect to the uncoated metallic foils. Improving the anodic stability of the current collectors is a crucial step in the development of a practical rechargeable Mg battery.

Original languageEnglish
Article number080526
JournalJournal of the Electrochemical Society
Volume168
Issue number8
DOIs
StatePublished - Aug 2021

Bibliographical note

Publisher Copyright:
© 2021 The Author(s).

Funding

The authors acknowledge financial support through European Union’s Horizon 2020 research and innovation program under grant agreement No 824066. SC and AM acknowledge Planning and Budget Committee Israel for fellowship.

FundersFunder number
Planning and Budget Committee Israel
Horizon 2020 Framework Programme824066

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