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Understanding the nature of the passivation layer enabling reversible calcium plating

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Abstract

As for other multivalent systems, the interface between the calcium (Ca) metal anode and the electrolyte is of paramount importance for reversible plating/stripping. Here, we combined experimental and theoretical approaches to unveil the potential solid electrolyte interphase (SEI) components enabling facile Ca plating. Borates compounds, in the form of cross-linked polymers are suggested as divalent conducting component. A pre-passivation protocol with such SEI is demonstrated and allows to broaden the possibility for electrolyte formulation. We also demonstrated a 10-fold increase in Ca plating kinetics by tuning the cation solvation structure in the electrolyte limiting the degree of contact ion pair.

Graphical abstract: Understanding the nature of the passivation layer enabling reversible calcium plating

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Article information


Submitted
23 Jul 2020
Accepted
26 Aug 2020
First published
26 Aug 2020

This article is Open Access

Energy Environ. Sci., 2020, Advance Article
Article type
Communication

Understanding the nature of the passivation layer enabling reversible calcium plating

J. Forero-Saboya, C. Davoisne, R. Dedryvère, I. Yousef, P. Canepa and A. Ponrouch, Energy Environ. Sci., 2020, Advance Article , DOI: 10.1039/D0EE02347G

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