金属醇盐水解法制备电池材料LiNiO_2

Synthesis of the Cell Material LiNiO_2 by Hydrolization of Metal Alkoxides

为制备电池正檄材料LiNiO2，采用了金属醇盐水解法。其过程为向80mL乙醇和1mL乙酰丙酮混合溶液中加入0．27g锂片，采用金属阳极溶解法控制电流为0．2A电解镍片6h，制得纳米LiNiO2前驱体。将电解液控制pH=9．0直接水解形成凝胶，经洗涤、干燥后在500℃煅烧2h，制得纳米LiNiO2粉体。产物通过傅立叶变换红外光谱（FF-IR）、电子透射显微镜（TEM）、X射线衍射（XRD）进行表征。结果表明，所得前驱体结构为LiNi（OEt）（4-n）（acac）n（acac为乙酰丙酮基）；干凝胶500℃煅烧后所得纳米LiNiO2粉体的粒径为25～35nm。

The hydrolization of metal alkoxides was used to synthesize positive pole materials LiNiO2. Adding 0.27g Li slice to 80mL ethanol and I mL acetyl-acetone solution, then the precursor of nano-LiNiO2 was synthesized by electrochemical dissolution of nickel for 6h at the current of 0.2A in the above. Controlling the pH of eletrolyte to 9.0, the precursor was hydrolyzed, and formed to xerogel powder. After washing, drying and calcining at 500℃ for 2h, the nano-LiNiO2 was obtained. The products were characterized by FT-IR spectrum, XRD, TEM. The experiments show that the precursor is LiNi（OEt）（4-n）（acac）n and the xerogel should be calcined at 500℃ in order to make the nano-sized LiNiO2 of 25-35 nm.