Synthesis and Capacitive Properties of Manganese Oxide Nanosheets Dispersed on Functionalized Graphene Sheets

被引：363

作者：

Zhang, Jintao ^{[1
]}

Jiang, Jianwen ^{[1
]}

Zhao, X. S. ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117576, Singapore

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 14期

关键词：

EXFOLIATED GRAPHITE OXIDE; ELECTROCHEMICAL CAPACITORS; SUPERCAPACITOR ELECTRODES; TEMPERATURE SYNTHESIS; AQUEOUS DISPERSIONS; HIGH-PERFORMANCE; CARBON; MNO2; REDUCTION; NANOPLATELETS;

D O I：

10.1021/jp200724h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Functionalized graphene was prepared by reducing functionalized graphene oxide with poly(diallyldimethylammonium chloride) (PDDA), transferring the surface charge of reduced graphene oxide (RGO) from negative to positive. A composite material of functionalized RGO with manganese dioxide (MnO2) nanosheets can be obtained by dispersing negatively charged MnO2 nanosheets on the functionalized RGO sheets via an electrostatic coprecipitation method. The structures of composites were investigated by high-resolution transmission electron microscopy (HRTEM), which indicated that the MnO2 nanosheets dispersed on functionalized RGO sheets, exhibiting a layered structure. The composite material exhibited enhanced capacitive performances than those of pure functionalized RGO and Na-typed birnessite (Na/MnO2) sheets, attributing to the synergic effect of both components. Additionally, over 89% of original capacitance was retained after 1000 cycles, indicating a good cycle stability of the composite materials.

引用

页码：6448 / 6454

页数：7

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