Enhanced electrochromism in gyroid-structured vanadium pentoxide.

Scherer, Maik R J; Li, Li; Cunha, Pedro M S; Scherman, Oren A; Steiner, Ullrich · Adv Mater · 2012

basic_science · Level V

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Abstract

Manufacturing V(2)O(5) in a 3D periodic highly interconnected gyroid structure on the 10 nm length scale is shown to lead to a significant electrochromic performance enhancement. The structured devices surpass previous inorganic electrochromic materials in all relevant parameters: the switching speed, coloration contrast, and composite coloration efficiency. In particular, the 85 ms switching speed lies within a factor of two of video rate. Enhanced ion intercalation into the gyroid morphology can be extended to other transition-metal oxides and is therefore promising for lithium ion batteries, supercapacitors, and sensors.

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