Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 27th March 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 12, 2015
Previous Article Next Article

CO2 and ambient air in metal–oxygen batteries: steps towards reality

Author affiliations

Abstract

Metal–air batteries, especially lithium and sodium air technologies, have attracted significant research attention in the past decade. The high theoretical specific energy (3500 Wh kg−1 for Li–O2 and 1600 Wh kg−1 for Na–O2) and moderate equilibrium potential (2.96 V for Li–O2 and 2.3 V for Na–O2) make these chemistries attractive energy storage platforms for transportation, autonomous aircraft, and emergent robotics technologies. The term metal–air battery, however, hardly describes the cell design under most active investigation by researchers; in most studies, O2 is used in place of air as the active material in the battery cathode. This change, designed to eliminate the formation of electrochemically stable metal hydroxide and metal carbonate discharge products when CO2 and moisture present in ambient air react with metal ions in the cathode, introduces significant new complications for practical metal–air battery design and operation that largely defeat the competitive advantages of this storage technology. Recent work has shown that when a mixture of O2 and CO2 is used as the active material in the cathode, it is possible to recharge a metal–O2/CO2 cell provided steps are taken to prevent electrolyte decomposition during recharge. In this highlight, we critically review the literature on metal–O2/CO2 cells, focusing on how the presence of CO2 in the active cathode material changes electrochemistry at the cathode and rechargeability of the cells. We also assess the progress and future prospects for metal–air battery technologies involving ambient air as the cathode gas.

Graphical abstract: CO2 and ambient air in metal–oxygen batteries: steps towards reality

Back to tab navigation

Publication details

The article was received on 02 Sep 2015, accepted on 22 Sep 2015 and first published on 05 Oct 2015


Article type: Highlight
DOI: 10.1039/C5QI00169B
Citation: Inorg. Chem. Front., 2015,2, 1070-1079

  •   Request permissions

    CO2 and ambient air in metal–oxygen batteries: steps towards reality

    S. Xu, S. Lau and L. A. Archer, Inorg. Chem. Front., 2015, 2, 1070
    DOI: 10.1039/C5QI00169B

Search articles by author

Spotlight

Advertisements