Abstract:

Nano-scale nickel hydroxide was synthesized by micro-emulsion in this paper and its structure, surface morphology and electrochemical performance were tested and analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), galvanostatic charge/discharge, cyclic voltammogram and impedance spectra. The results manifested that nano-scale nickel hydroxide turned to different morphology after hydrothermal and micro-emulsion/hydrothermal modification. Though the results of the activation performance of unsettled and treated nano-scale nickel hydroxide were uniform, the discharging specific capacity of nano-scale nickel hydroxide was changed. The discharging specific capacity of nano-scale nickel hydroxide which was under hydrothermal treatment at 140℃ and micro-emulsion/hydrothermal treatment was increased by 62.6 mAh/g and 112.8 mAh/g respectively. The peak current of cyclic voltammetry also increased and the charge-transfer resistances decreased from 2.633 Ω to 2.464 Ω and 1.679 Ω.

Key words: nano-scale nickel hydroxide, micro-emulsion, hydrothermal