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of 5.0-8.0, and fibre-shape precursor is got at pH value higher than 8.0. The Ni/Co ratios in the above two precursors are not reproduced as that in the feed due to the formation of multi-coordinated Ni... with fibrous morphology can be obtained. Key words: thermodynamic analysis; nickel-cobalt alloy; nickel-cobalt oxalate precursor; predefined Ni/Co ratio; fibre-shape 1 Introduction As important......
in Fig.5. From Fig.5, it can be seen that when pH is below 8.0, the cubic-shaped particles are obtained; however, when pH is above 8.0, the fibre-shape particles are produced. Undoubtedly, the different... is of cubic-shape. Some experiments were made to confirm the relation between the total concentration of nickel ion and pH. It is shown that the thermodynamic mathematical model is correct......