The cover art is attributed to an article entitled “Role of Oxygen Functional Groups in Electrochemical Sodium Ion Intercalation into Oxygen-Functionalized Graphitic Carbon Materials” by Prof. Junichi Inamoto et al. Editor’s Choice of this issue is a systematic computational study on oxygen-functionalized graphite materials for sodium-ion battery applications. Graphene-like graphite (GLG) is a potential candidate of negative electrode materials for sodium-ion battery because of its capability of reversible Na+ intercalation/de-intercalation, while the same electrode reactions are hindered with conventional graphite materials. In this work, the authors investigated the role of oxygen-based functional groups for Na+-intercalation into GLG by density functional theory calculations. The positive shift of the Na+ intercalation potential associated with change in electronic state of GLG upon introduction of oxygen groups was found to be responsible for the favorable electrochemical characteristics.
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