A high-voltage concept with sodium-ion conducting β-alumina for magnesium-sodium dual-ion batteries
Kravchyk, Kostiantyn V.
Kovalenko, Maksym V.
- Journal Article
Rights / licenseCreative Commons Attribution 4.0 International
Rechargeable magnesium-sodium dual-ion batteries that use dendrite-free magnesium metal as an anode, magnesium-sodium dual-ion electrolyte and sodium-ion cathode are appealing as safe, low-cost systems for large-scale stationary electricity storage. Although substantial advances have been made on magnesium-sodium dual-ion batteries with various sodium-ion cathodes, further development of such batteries is inherently limited by the low electrochemical oxidative stability of known dual-ion electrolytes (2–2.6 V vs. Mg2+/Mg). Here, we examine a magnesium-sodium dual-ion concept, which allows for higher operating voltages of magnesium-sodium dual-ion batteries by using oxidatively stable sodium-ion electrolytes along with a sodium-ion conducting β-alumina membrane on the cathode side. The proposed concept is assessed using a high-voltage Na1.5VPO4.8F0.7 cathode demonstrating a high average discharge voltage of 3.0 V, a cathodic capacity of 110 mAh g−1 and an energy efficiency of 90%. Show more
Journal / seriesCommunications Chemistry
Pages / Article No.
PublisherNature Publishing Group
Organisational unit03934 - Kovalenko, Maksym / Kovalenko, Maksym
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