Stretchable Electrodes with Interfacial Percolation Network.

Stretchable electrodes are an essential component that determines the functionality and reliability of stretchable electronics, but face the challenge of balancing conductivity and stretchability. Here, we propose a new conducting concept called the interfacial percolation network (PN) that results in stretchable electrodes with high conductivity, large stretchability, and high stability. The interfacial PN was composed of a two-dimensional (2D) PN and a protruding PN embedded on the surface and in the near-surface region of an elastic polymer matrix, respectively. The protruding PN was the key design to intimately link the 2D conducting channels on the surface of the elastomer with the 3D conducting channels in the bulk of the elastomer. The protruded PN was obtained by changing the arrangements of silver nanowires (AgNWs) from horizontal to quasi-vertical through introducing foreign polymer domains in the near-surface region of the polymer matrix. The resulting electrode achieved a conductivity of 13,500 S cm

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