18_13b/2006Inside Front Cover: Photonic Crystal Structures as a Basis for a Three-Dimensionally Interpenetrating Electrochemical-Cell System (Adv. Mater. 13/2006)

The inside cover shows an SEM image of a 3D-interpenetrating electrochemical cell with submicrometer features, as reported by Stein and coworkers on p. 1750. The pores of an inverse-opal carbon electrode are coated with a conformal layer of a polymer separator and infiltrated with vanadia to form the opposite electrode after lithiation. The idealized scheme illustrates lithium-ion transport between the electrodes through the polymer membrane.

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