Abstract
The nanosized cathode material Ni(OH) 2 powder for alkaline batteries was synthesized by solid-state reaction at room temperature through NiC 2O 4·2H 2O as precursor, which was also prepared with solid-state reaction from nickel acetate and oxalic acid at ambient temperature. The precursor and the Ni(OH) 2 samples were characterized by X-ray diffraction (XRD), infrared spectrometry (IR), transmission electron microscopy (TEM) and electrochemical testing. The results revealed that the as-synthesized Ni(OH) 2 sample by this method is β(II)-type phase, and its shape is fibroid with the average particle size of 6–9 nm. Compared with microsized spherical β-Ni(OH) 2, the nanosized β-Ni(OH) 2 exhibits excellent electrochemical performance, such as lower polarization and better charge–discharge properties.
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