NiO纳米粉体的溶胶-凝胶法制备及表征
Preparation and Characterization of Nano-crystalline NiO Powder Prepared by Sol-gel Process
蔡 羽1, 吴朝阳2, 赵胜利2
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作者单位：1. 河南科技大学 信息管理研究所, 河南 洛阳 471003; 2. 河南科技大学 材料学院, 河南 洛阳 471003
中文关键字：氧化镍； 纳米粉体； 溶胶-凝胶
英文关键字：nickel oxide; nano-crystalline; sol-gel
中文摘要：采用溶胶-凝胶(Sol-gel)并结合热处理工艺制备氧化镍粉体，考察烧结条件对NiO粉体组成、结构和形貌的影响，并对其电化学性能进行研究。结果表明：以醋酸镍为镍源，PAA为螯合剂合成了均匀稳定的溶胶；在热处理过程中，干凝胶前驱体在450 ℃基本分解完全并逐渐形成纳米晶NiO粉体；在粉体热处理过程中随着温度的升高，凝胶中的有机物去除更加完全，NiO晶型趋于完整，晶粒逐渐增大；在600 ℃烧结获得的晶型完整、颗粒分布均匀，同时也表现出了良好的充放电稳定性。
英文摘要：The nano-NiO powder was prepared by sol-gel method combining heat treatment technology, and the microstructure, composition and morphology were studied. In addition, the NiO powder electro-chemical properties were measured by constant current charging and discharging. The results show that a stable sol can be synthesized by using nickel acetate as source of nickel and PAA as chelating agent. In the heat treatment, the gel decomposes completely and gradually forms nano-crystal at 450 ℃. The grain size gradually increases when the annealing temperature rises. The nano-NiO powder sintering at 600 ℃ for 2 h exhibits integrity crystal structure, uniform particle, low agglomeration and superior electrochemistry performance.