电脱氧法制备Ni基电池材料的研究

Preparation of Ni-Based Cell Materials by Electro-Deoxidization in Molten Salt

摘要:

利用电脱氧法(FFC)从NiO-CeO2、NiO-SnO2氧化物制备CeNi5、Ni3Sn2。以不同温度烧结的混合氧化物试样作阴极，石墨碳棒作阳极，在850 ℃的CaCl2熔盐中，3.1 V电压下完成反应。采用SEM和XRD分析电解前后试样形貌及相组成。结果表明：烧结温度越高，试样的孔隙率越低，电解电流越小；不同温度烧结试样可电解出纯CeNi5相，低温烧结试样可电解出纯Ni3Sn2相，产物为疏松的海绵状。本实验为电池材料提供了一种新的制备方法

Abstract:

CeNi5 and Ni3Sn2 were prepared from NiO-CeO2 and NiO-SnO2 oxides by electro-deoxidization (FFC). The samples of mixed oxides sintered at different temperatures were used as cathode, and the graphite rod was used as anode. Then the reaction was completed under 3.1 V in the CaCl2 solution at 850 oC. The morphology and phase composition of the samples before and after deoxidization were analyzed by SEM and XRD. Results show that the sample has lower porosity and smaller electro-deoxidization current under the condition of higher sintering temperature. The product from samples sintered at different temperatures was pure CeNi5; the product from samples sintered at lower temperature was pure Ni3Sn2 with loose sponginess. The research provides a new method for cell materials preparation