Synthesizing MnO2 nanosheets from graphene oxide templates for high performance pseudosupercapacitors

被引：206

作者：

Zhao, Guixia ^{[1
]}

Li, Jiaxing ^{[1
]}

Jiang, Lang ^{[2
]}

Dong, Huanli ^{[2
]}

Wang, Xiangke ^{[1
]}

Hu, Wenping ^{[2
]}

机构：

[1] Acad Sinica, Inst Plasma Phys, Key Lab Novel Thin Film Solar Cells, Hefei 230031, Peoples R China

[2] Chinese Acad Sci, Beijing Natl Lab Mol Sci, Key Lab Organ Solids, Inst Chem, Beijing 100190, Peoples R China

来源：

CHEMICAL SCIENCE | 2012年 / 3卷 / 02期

基金：

中国国家自然科学基金;

关键词：

LAYERED MANGANESE OXIDE; HYDROTHERMAL SYNTHESIS; PSEUDOCAPACITANCE PROPERTIES; ELECTROCHEMICAL PROPERTIES; NANOSTRUCTURED MATERIALS; ENERGY-CONVERSION; ANODIC DEPOSITION; STORAGE DEVICES; RUTHENIUM OXIDE; ELECTRODE;

D O I：

10.1039/c1sc00722j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A facile method to synthesize layered manganese oxide nanosheets was developed for the first time by using graphene oxide as a template. The in situ replacement of carbon atoms on the graphene oxide framework by edge-shared [MnO6] octahedra provides a new methodology to synthesize graphene-based two-dimensional nanomaterials. The transformation of graphene oxide into delta-type MnO2 nanosheets results in an especially high surface area (157 m(2) g(-1)), which is the highest value amongst today's MnO2 nanomaterials. Moreover, the MnO2 nanosheets demonstrated prominent capacitance (similar to 1017 F g(-1) at a scan rate of 3 mV s(-1), and similar to 1183 F g(-1) at a current density of 5 A g(-1)) and remarkable rate capability (similar to 244 F g(-1) at a high scan rate of 50 mV s(-1) and similar to 559 F g(-1) at a high current density of 25 A g(-1)), indicating their promise in high energy and power density pseudosupercapacitors.

引用

页码：433 / 437

页数：5

共 47 条

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