Hierarchical Configuration of NiCo2S4 Nanotube@Ni鈥揗n Layered Double Hydroxide Arrays/Three-Dimensional Graphene Sponge as Electrode Materials for High-Capacitance Supercapacitors

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• 作者：Houzhao Wan ; Jia Liu ; Yunjun Ruan ; Lin Lv ; Lu Peng ; Xiao Ji ; Ling Miao ; Jianjun Jiang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：July 29, 2015
• 年：2015
• 卷：7
• 期：29
• 页码：15840-15847
• 全文大小：552K
• ISSN：1944-8252

文摘

Three dimensional (3D) hierarchical network configurations are composed of NiCo₂S₄ nanotube @Ni鈥揗n layered double hydroxide (LDH) arrays in situ grown on graphene sponge. The 3D graphene sponge with robust hierarchical porosity suitable for as a basal growth has been obtained from a colloidal dispersion of graphene oxide using a simple directional freeze-drying technique. The high conductive NiCo₂S₄ nanotube arrays grown on 3D graphene shows excellent pseudocapacity and good conductive support for high-performance Ni鈥揗n LDH. The 3D NiCo₂S₄@Ni鈥揗n LDH/GS shows a high specific capacitance (C_sp) 1740 mF cm^鈥? at 1 mA cm^鈥?, even at 10 mA cm^鈥?, 1267.9 mF cm^鈥? maintained. This high-performance composite electrode proposes a new and feasible general pathway as 3D electrode configuration for energy storage devices.