Graphene oxide nanosheets/multi-walled carbon nanotubes hybrid as an excellent electrocatalytic material towards VO2+/VO2+ redox couples for vanadium redox flow batteries

被引：294

作者：

Han, Pengxian ^{[1
]}

Yue, Yanhua ^{[1
]}

Liu, Zhihong ^{[1
]}

Xu, Wei ^{[2
]}

Zhang, Lixue ^{[1
]}

Xu, Hongxia ^{[1
]}

Dong, Shanmu ^{[1
]}

Cui, Guanglei ^{[1
]}

机构：

[1] Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Peoples R China

[2] Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2011年 / 4卷 / 11期

基金：

中国国家自然科学基金;

关键词：

GRAPHITE ELECTRODE MATERIALS; CHEMICAL-MODIFICATION; IMPEDANCE; TRANSPARENT; FILMS; FELT; CELL;

D O I：

10.1039/c1ee01776d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A graphene oxide nanosheets/multi-walled carbon nanotubes (GO/MWCNTs) hybrid with excellent electrocatalytic redox reversibility towards VO2+/VO2+ redox couples for vanadium redox flow batteries (VRFB) has been prepared by an electrostatic spray technique after efficient ultrasonic treatment. The structures and electrochemical properties of GO/MWCNTs are investigated by transmission electron microscopy, scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy and cyclic voltammetry. GO/MWCNTs are shown to be cross-linked and form an electrocatalytic hybrid with an effective mixed conducting network, leading to efficiently fast ion and electron transport characteristics. Compared with the pure GO nanosheets and MWCNTs, GO/MWCNTs deliver a much better electrocatalytic redox reversibility towards the positive VO2+/VO2+ couple, especially for the reduction from VO2+ to VO2+. The excellent experimental results demonstrate that the newly developed hybrid material holds great promise in the application of VRFB.

引用

页码：4710 / 4717

页数：8

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