A Nanostructured Electrochromic Supercapacitor

被引：367

作者：

Wei, Di ^{[1
]}

Scherer, Maik R. J. ^{[2
]}

Bower, Chris ^{[1
]}

Andrew, Piers ^{[1
]}

Ryhaenen, Tapani ^{[1
]}

Steiner, Ullrich ^{[2
]}

机构：

[1] Nokia Res Ctr, Cambridge CB3 0FA, England

[2] Univ Cambridge, Dept Phys, Cambridge CB3 0HE, England

来源：

NANO LETTERS | 2012年 / 12卷 / 04期

关键词：

Electrochromic supercapacitor; vanadium pentoxide; copolymer self-assembly; double-gyroid; nanostructured intercalation compound; VANADIUM PENTOXIDE; V2O5; AEROGEL; ELECTRODES; STORAGE; FILMS; THIN; INTERCALATION; COMPOSITES; BATTERIES; INSERTION;

D O I：

10.1021/nl2042112

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report the first successful application of an ordered bicontinuous double-gyroid vanadium pentoxide network in an electrochromic supercapacitor. The freestanding vanadia network was fabricated by electrodeposition into a voided block copolymer template that had self-assembled into the double-gyroid morphology. The highly ordered structure with 11.0 nm wide struts and a high specific surface to bulk volume ratio of 161.4 mu m(-1) is ideal for fast and efficient lithium ion intercalation/extraction and faradaic surface reactions, which are essential for high energy and high power density electrochemical energy storage devices. Supercapacitors made from such gyroid-structured vanadia electrodes exhibit a high specific capacitance of 155 F g(-1) and show a strong electrochromic color change from green/gray to yellow, indicating the capacitor's charge condition. The nanostructuring approach and utilizing an electrode material that has intrinsic electrochemical color-change properties are concepts that can be readily extended to other electrochrornic intercalation compounds.

引用

页码：1857 / 1862

页数：6

共 25 条

[1] Nanostructured materials for advanced energy conversion and storage devices [J].