Abstract:The Cover Feature illustrates a binder‐free electrode design on Ni foam with a uniquely nano‐structured electroactive material: yolk–shell ZnO/ZnFe2O4 nanospheres matrixed in three‐dimensional graphene hydrogel. The design results in a fourfold increase in the specific capacitance in comparison to that of solid metal oxide spheres. More information can be found in the Article by S. K. Jhajharia et al. on page 5819 in Issue 23, 2019 (DOI: 10.1002/celc.201901269).
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