In Situ Ni/Al Layered Double Hydroxide and Its Electrochemical Capacitance Performance

详细信息    查看全文

• 作者：Jun Wang ; Yanchao Song ; Zhanshuang Li ; Qi Liu ; Jideng Zhou ; Xiaoyan Jing ; Milin Zhang ; Zhaohua Jiang
• 刊名：Energy & Fuels
• 出版年：2010
• 出版时间：December 16, 2010
• 年：2010
• 卷：24
• 期：12
• 页码：6463-6467
• 全文大小：806K
• 年卷期：v.24,no.12(December 16, 2010)
• ISSN：1520-5029

文摘

Electrodes of Ni/Al layered double hydroxide (Ni/Al LDH) coated on the surface of nickel foam are successfully prepared by an in situ method using a mixed aqueous solution of nickel nitrate and aluminum. Their structure and surface morphology are studied by X-ray diffraction and scanning electron microscopy analysis. Their supercapacitance performances are investigated by cyclic voltammetry and constant current charge/discharge measurements. Results show that Ni/Al LDH nanoplatelets densely cover the nickel foam substrate. The electrode shows excellent electrochemical capacitive character and displays a specific capacitance of 701 F g⁻¹ at a current density of 10 mA cm⁻². The capacitance loss is less than 6% after 400 charge−discharge cycles. The larger contact area between the nickel foam supporter and active materials greatly enhances the use of Ni/Al LDH.