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Understanding the nature of the passivation layer enabling reversible calcium plating

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.
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https://hal-univ-pau.archives-ouvertes.fr/hal-03030874
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Submitted on : Monday, November 30, 2020 - 11:51:47 AM
Last modification on : Friday, January 15, 2021 - 9:20:27 AM

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Juan Forero-Saboya, Carine Davoisne, Rémi Dedryvère, Ibraheem Yousef, Pieremanuele Canepa, et al.. Understanding the nature of the passivation layer enabling reversible calcium plating. Energy & Environmental Science, Royal Society of Chemistry, 2020, 13, pp.3423 - 3431. ⟨10.1039/d0ee02347g⟩. ⟨hal-03030874⟩

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