Batteries: Potassium Prussian Blue Nanoparticles: A Low‐Cost Cathode Material for Potassium‐Ion Batteries (Adv. Funct. Mater. 4/2017)

In article 1604307, potassium Prussian blue nanoparticles are investigated by Y. Lei and co-workers as cathode materials for potassium-ion batteries and exhibit great electrochemical performance. The cover illustrates the successful demonstration of a full cell by coupling with commercially available carbon materials. Considering the low cost and material sustainability, this work highlights the promise of electrochemical potassium storage.