Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7716565 | International Journal of Hydrogen Energy | 2015 | 7 Pages |
Abstract
High-density Al-substituted α-nickel hydroxide with interlayer NO3â for alkaline nickel-based rechargeable batteries has been synthesized using a polyacrylamide (PAM) assisted two-step drying method. In order to improve its electrochemical performance, Al-substituted α-Ni(OH)2 with interlayer NO3â is modified by a simple anion exchange method using NaCl solution. The physical and electrochemical properties of the synthesized material are characterized by means of X-ray diffraction (XRD), infrared spectroscopy (IR), scanning electron microscopy (SEM), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and a charge-discharge test. Compared with NO3â intercalated α-Ni(OH)2 precursor, the resulting Clâ intercalated α-Ni(OH)2 samples possess more excellent electrochemical activities, including higher proton diffuse coefficient, lower electrochemical impedance, higher specific capacity, and better cyclic stability. Especially, it is also found that the introduction of Clâ can greatly accelerate the activation process of α-Ni(OH)2 electrodes.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Jing Li, Enbo Shangguan, Mengzhen Nie, Qingxiao Jin, Kang Zhao, Zhaorong Chang, Xiao-Zi Yuan, Haijiang Wang,