Free-Standing Three-Dimensional Graphene/Manganese Oxide Hybrids As Binder-Free Electrode Materials for Energy Storage Applications

被引：112

作者：

Zhu, Xiaoli ^{[1
,4
]}

Zhang, Peng ^{[1
,4
]}

Xu, Shan ^{[3
]}

Yan, Xingbin ^{[1
,2
]}

Xue, Qunji ^{[2
]}

机构：

[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, Lab Clean Energy Chem & Mat, Lanzhou 730000, Peoples R China

[2] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China

[3] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China

[4] Chinese Acad Sci, Grad Univ, Beijing 100080, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2014年 / 6卷 / 14期

关键词：

3D graphene; MnO2; supercapacitor; Li-O-2; battery; Li-MnO2; LI-O-2; BATTERIES; GRAPHENE; SUPERCAPACITORS; CARBON; ARCHITECTURE; CHARGE;

D O I：

10.1021/am5024258

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Novel three-dimensional (3D) hybrid materials, i.e., free-standing 3D graphene-supported MnO2 nanosheets, are prepared by a simple and controllable solution-phase assembly process. Characterization results show that MnO2 nanosheets are uniformly anchored on a 3D graphene framework with strong adhesion and the integral hybrids show desirable mechanical strength. Such unique structure of 3D graphene/MnO2 hybrids thus provides the right characteristics of binder-free electrode materials and could enable the design of different kinds of high-performance energy storage devices. Especially, an advanced asymmetric supercapacitor is built by using a 3D graphene/MnO2 hybrid and a 3D graphene as two electrodes, and it is able to work reversibly in a full operation voltage region of 0-3.5 V in an ionic liquid electrolyte and thus exhibits a high energy density of 68.4 Wh/kg. As the cathode materials for Li-O-2 and Li-MnO2 batteries, the 3D graphene/MnO2 hybrids exhibit outstanding performances, including good catalytic capability, high reversible capacity and desirable cycling stability. The results presented here may pave a way for new promising applications of such 3D graphene/MnO2 hybrids in advanced electrochemical energy storage devices.

引用

页码：11665 / 11674

页数：10

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