Atomic Layer Deposition of TiO2 on Graphene for Supercapacitors

被引：185

作者：

Sun, Xiang ^{[1
]}

Xie, Ming ^{[2
,3
]}

Wang, Gongkai ^{[1
]}

Sun, Hongtao ^{[1
]}

Cavanagh, Andrew S. ^{[2
,3
]}

Travis, Jonathan J. ^{[2
,3
]}

George, Steven M. ^{[2
,3
]}

Lian, Jie ^{[1
]}

机构：

[1] Rensselaer Polytech Inst, Dept Mech Aerosp & Nucl Engn, Troy, NY 12180 USA

[2] Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA

[3] Univ Colorado, Dept Chem & Biol Engn, Boulder, CO 80309 USA

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2012年 / 159卷 / 04期

基金：

美国国家科学基金会;

关键词：

ELECTROCHEMICAL CAPACITORS; CARBON NANOTUBES; PHOTOCATALYTIC ACTIVITY; TITANIA NANOTUBES; ROTARY REACTOR; FILMS; ELECTRODES; NANOPARTICLES; PERFORMANCE; GRAPHITE;

D O I：

10.1149/2.025204jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A nano-scaled coating of titanium oxide (TiO2) on graphene (G) has been achieved via a novel atomic layer deposition (ALD) method. As a potential supercapacitor material, the TiO2-G composites exhibited a capacity of 75 F/g and 84 F/g at a scan rate of 10 mV/s for composites grown using 50 and 100 ALD cycles, respectively. The nearly identical Nyquist plots of the TiO2-G composites compared with those of pure graphene demonstrated that the composites possess excellent conductivity for charge transfer and open structures for ion diffusion. In addition, even with 3-4 times additional mass loading (maximum 3.22 mg/cm(2)), the composites exhibit no obvious degradation with respect to the electrochemical performance. This ALD approach presents a promising route to synthesize advanced graphene-based nanocomposites for supercapacitor applications. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.025204jes] All rights reserved.

引用

页码：A364 / A369

页数：6

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