Understanding the nature of the passivation layer enabling reversible calcium plating

Forero-Saboya, J.; Davoisne, C.; Dedryvère, R.; Yousef, I.; Canepa, P.; Ponrouch, A.

doi:10.1039/D0EE02347G

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. 13, 3423–3431 (2020).

BibTeX

@article{Forerosaboya2020understanding,
  author  = {Forero-Saboya, J. and Davoisne, C. and Dedryvère, R. and Yousef, I. and Canepa, P. and Ponrouch, A.},
  title   = {{Understanding the nature of the passivation layer enabling reversible calcium plating}},
  journal = {Energy & Environmental Science},
  volume  = {13},
  pages   = {3423--3431},
  year    = {2020},
  doi     = {10.1039/D0EE02347G}
}

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.