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Evaluation of Mg Compounds as Coating Materials in Mg Batteries.

ABSTRACT: Mg batteries utilizing a Mg metal anode with a high-voltage intercalation cathode define a potential pathway toward energy storage with high energy density. However, the making of Mg batteries is plagued by the instability of existing electrolytes against the Mg-metal anode and high-voltage cathode materials. One viable solution to this problem is the identification of protective coating materials that could effectively separate the distinct chemistries of the metal-anode and the cathode materials from the electrolyte. Using first-principles calculations we mapped the electrochemical stability windows for non-redox-active Mg binary and ternary compounds in order to identify potential coating materials for Mg batteries. Our results identify Mg-halides and Mg(BH₄)₂ as promising anode coating materials based on their significant reductive stability. On the cathode side, we single out MgF₂, Mg(PO₃)₂, and MgP₄O₁₁ as effective passivating agents.

SUBMITTER: Chen T

PROVIDER: S-EPMC6363690 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature

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Evaluation of Mg Compounds as Coating Materials in Mg Batteries.

Chen Tina T Ceder Gerbrand G Sai Gautam Gopalakrishnan G Canepa Pieremanuele P

Frontiers in chemistry 20190130

Mg batteries utilizing a Mg metal anode with a high-voltage intercalation cathode define a potential pathway toward energy storage with high energy density. However, the making of Mg batteries is plagued by the instability of existing electrolytes against the Mg-metal anode and high-voltage cathode materials. One viable solution to this problem is the identification of protective coating materials that could effectively separate the distinct chemistries of the metal-anode and the cathode materia ...[more]

PMID: 30761292

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