Hydrothermal synthesis and pseudocapacitance properties of α-MnO2 hollow spheres and hollow urchins

被引：507

作者：

Xu, Maowen ^{[1
]}

Kong, Lingbin ^{[3
]}

Zhou, Wenjia ^{[1
]}

Li, Hulin ^{[1
,2
]}

机构：

[1] Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Peoples R China

[2] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Engn, Nanjing 210016, Peoples R China

[3] Lanzhou Univ Technol, State Key Lab Gansu Adv Non Ferrous Met Mat, Lanzhou 730050, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2007年 / 111卷 / 51期

关键词：

D O I：

10.1021/jp076730b

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：

In this work, alpha-MnO2 hollow spheres and hollow urchins are synthesized via a simple hydrothermal process without using any template or organic surfactant. The effect of the reaction time on the microstructure and morphology of samples is observed systemically. Meanwhile, the forming mechanism of hollow-structured (alpha-MnO2 is carefully investigated by using field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM). The results of nitrogen adsorption-desorption experiments and electrochemical measurements show that the product obtained by hydrothermal reaction for 6 h has large specific surface area, uniform pore-size distribution, and excellent capacitance performance, which make it have a potential application as a supercapacitor electrode material.

引用

页码：19141 / 19147

页数：7

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