Facile Route to an Efficient NiO Supercapacitor with a Three-Dimensional Nanonetwork Morphology

详细信息    查看全文

• 作者：Sun-I Kim ; Jung-Soo Lee ; Hyo-Jin Ahn ; Hyun-Kon Song ; Ji-Hyun Jang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2013
• 出版时间：March 13, 2013
• 年：2013
• 卷：5
• 期：5
• 页码：1596-1603
• 全文大小：667K
• 年卷期：v.5,no.5(March 13, 2013)
• ISSN：1944-8252

文摘

NiO nanostructures with three distinct morphologies were fabricated by a sol鈥揼el method and their morphology-dependent supercapacitor properties were exploited. The nanoflower- shaped NiO with a distinctive three-dimensional (3D) network and the highest pore volume shows the best supercapacitor properties. The nanopores in flower-shaped nanostructures, offering advantages in contact with and transport of the electrolyte, allow for 3D nanochannels in NiO structure, providing longer electron pathways. The XPS and EIS data of the NiO nanostructure confirm that the flower-shaped NiO, which has the lowest surface area among the three morphologies, was effectively optimized as a superior electrode and yielded the greatest pseudocapacitance. This study indicates that forming a 3D nanonetwork is a straightforward means of improving the electrochemical properties of a supercapacitor.

Keywords:

NiO; Ni(OH)₂; morphology-dependent properties; nanostructure; three-dimensional networks; mesopores