Hydrothermal Synthesis and Pseudocapacitance Properties of -MnO2 Hollow Spheres and Hollow Urchins

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• 作者：Maowen Xu ; Lingbin Kong ; Wenjia Zhou ; Hulin Li
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：December 27, 2007
• 年：2007
• 卷：111
• 期：51
• 页码：19141 - 19147
• 全文大小：1019K
• 年卷期：v.111,no.51(December 27, 2007)
• ISSN：1932-7455

文摘

In this work, -MnO₂ hollow spheres and hollow urchins are synthesized via a simple hydrothermal processwithout using any template or organic surfactant. The effect of the reaction time on the microstructure andmorphology of samples is observed systemically. Meanwhile, the forming mechanism of hollow-structured-MnO₂ is carefully investigated by using field emission scanning electron microscopy (FESEM), transmissionelectron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM). The results ofnitrogen adsorption-desorption experiments and electrochemical measurements show that the product obtainedby hydrothermal reaction for 6 h has large specific surface area, uniform pore-size distribution, and excellentcapacitance performance, which make it have a potential application as a supercapacitor electrode material.