title: Facile one-step synthesis of nanocomposite based on carbon nanotubes and Nickel-Aluminum layered double hydroxides with high cycling stability for supercapacitors.
abstract: Nickel-Aluminum Layered Double Hydroxide (NiAl-LDH) and nanocomposite of Carbon Nanotubes (CNTs) and NiAl-LDH (CNTs/NiAl-LDH) were prepared by using a facile one-step homogeneous precipitation approach. The morphology, structure and electrochemical properties of the as-prepared CNTs/NiAl-LDH nanocomposite were then systematically studied. According to the galvanostatic charge-discharge curves, the CNTs/NiAl-LDH nanocomposite exhibited a high specific capacitance of 694Fg(-1) at the 1Ag(-1). Furthermore, the specific capacitance of the CNTs/NiAl-LDH nanocomposite still retained 87% when the current density was increased from 1 to 10Ag(-1). These results indicated that the CNTs/NiAl-LDH nanocomposite displayed a higher specific capacitance and rate capability than pure NiAl-LDH. And the participation of CNTs in the NiAl-LDH composite improved the electrochemical properties. Additionally, the capacitance of the CNTs/NiAl-LDH nanocomposite kept at least 92% after 3000cycles at 20Ag(-1), suggesting that the nanocomposite exhibited excellent cycling durability. This strategy provided a facile and effective approach for the synthesis of nanocomposite based on CNTs and NiAl-LDH with enhanced supercapacitor behaviors, which can be potentially applied in energy storage conversion devices.
authors.affiliation: College of Science, Northwest A&F University, Yangling, Shaanxi, China.
authors.forename: Caihui
authors.initials: C
authors.lastname: Bai
authors.affiliation: College of Science, Northwest A&F University, Yangling, Shaanxi, China.
authors.forename: Shiguo
authors.initials: S
authors.lastname: Sun
authors.affiliation: College of Science, Northwest A&F University, Yangling, Shaanxi, China.
authors.forename: Yongqian
authors.initials: Y
authors.lastname: Xu
authors.affiliation: College of Science, Northwest A&F University, Yangling, Shaanxi, China.
authors.forename: Ruijin
authors.initials: R
authors.lastname: Yu
authors.affiliation: College of Science, Northwest A&F University, Yangling, Shaanxi, China. Electronic address: hongjuanli@nwsuaf.edu.cn.
authors.forename: Hongjuan
authors.initials: H
authors.lastname: Li
keywords: Carbon nanotubes; Homogeneous precipitation; Layered double hydroxides; Nanocomposite; Specific capacitance; Supercapacitor