High Performance All-Solid-State Flexible Micro-Pseudocapacitor Based on Hierarchically Nanostructured Tungsten Trioxide Composite

被引：50

作者：

Huang, Xuezhen ^{[1
]}

Liu, Hewei ^{[1
]}

Zhang, Xi ^{[1
]}

Jiang, Hongrui ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Elect & Comp Engn, Mat Sci Program, Madison, WI 53706 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2015年 / 7卷 / 50期

基金：

美国国家卫生研究院;

关键词：

nanomaterials; energy storage; tungsten oxide; microsupercapacitors; laser patterning; ENERGY-STORAGE; SUPERCAPACITOR ELECTRODE; MESOPOROUS CARBON; FABRICATION; CHIP; WO3;

D O I：

10.1021/acsami.5b09257

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Microsupercapacitors (MSCs) are promising energy storage devices to power miniaturized portable electronics and microelectromechanical systems. With the increasing attention on all-solid-state flexible supercapacitors, new strategies for high-performance flexible MSCs are highly desired. Here, we demonstrate all-solid-state, flexible micropseudocapacitors via direct laser patterning on crack-free, flexible WO3/polyvinylidene fluoride (PVDF)/multiwalled carbon nanotubes (MWCNTs) composites containing high levels of porous hierarchically structured WO3 nanomaterials (up to 50 wt %) and limited binder (PVDF, <25 wt %). The work leads to an areal capacitance of 62.4 mF.cm(-2) and a volumetric capacitance of 10.4 F.cm(-3), exceeding that of graphene based flexible MSCs by a factor of 26 and 3, respectively. As a noncarbon based flexible MSC, hierarchically nanostructured WO3 in the narrow finger electrode is essential to such enhancement in energy density due to its pseudocapacitive property. The effects of WO3/PVDF/MWCNTs composite composition and the dimensions of interdigital structure on the performance of the flexible MSCs are investigated.

引用

页码：27845 / 27852

页数：8

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