Reversible Sodium Storage: Promoting Highly Reversible Sodium Storage of Iron Sulfide Hollow Polyhedrons via Cobalt Incorporation and Graphene Wrapping (Adv. Energy Mater. 33/2019)

In article number 1901584, Hui Ying Yang and co-workers develop hollow iron sulfide polyhedrons with cobalt doping and graphene wrapping. This rationally designed anode material shows fast and continuous electron transportation, high Na+ ion flux, and strong structural integrity with extremely small volume variation upon sodiation/desodiation. It is highly applicable to next generation sodium ion batteries with high-rate capability and long-term cyclability.