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首页> 外文期刊>Journal of power sources >Structural characteristics of nickel hydroxide synthesized by a chemical precipitation route under different pH values
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Structural characteristics of nickel hydroxide synthesized by a chemical precipitation route under different pH values

机译：不同pH值下化学沉淀法合成氢氧化镍的结构特征

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摘要

The effects of precipitation pH values on the microstructural characteristics of nickel hydroxide materials synthesized by a chemical precipitation method have been studied. The relationship between structural characteristics and electrochemical activity of nickel hydroxide was also examined. The structural characteristics of the synthesized β-Ni(OH)_2, such as degree of crystallinity, crystalline lattice disorders, crystallite size and crystal growth orientation were strongly related to the pH values of the chemical precipitation reaction. The amounts of SO_4~(2-), CO_3~(2-) and H_2O adsorbed in crystals, and the thermal stability of the β-Ni(OH)_2 also depended on the pH. Under relatively high pH values, the synthesized nickel hydroxide materials possessed a reduced crystallite size and lower thermal stability, more crystalline defects and a higher Ni composition. All these characteristics were likely to improve the electrochemical activity of nickel hydroxide.
机译：研究了沉淀pH值对化学沉淀法合成氢氧化镍材料微观结构特征的影响。还研究了氢氧化镍的结构特征与电化学活性之间的关系。合成的β-Ni（OH）_2的结构特征，如结晶度，晶格紊乱，微晶尺寸和晶体生长取向与化学沉淀反应的pH值密切相关。晶体中SO_4〜（2-），CO_3〜（2-）和H_2O的吸附量以及β-Ni（OH）_2的热稳定性也取决于pH值。在较高的pH值下，合成的氢氧化镍材料具有减小的微晶尺寸和较低的热稳定性，更多的晶体缺陷和较高的Ni组成。所有这些特性都可能改善氢氧化镍的电化学活性。

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