乏燃料熔盐电解精炼过程中,由于部分乏燃料元素,如铀、钚、稀土及次锕系元素等的表观电极电位值比较接近,以至这些元素的分离纯化效果较差。如果在熔盐中加入其他不同于电解溶剂阴离子的熔盐阴离子,则加入的阴离子就将会与这些难分离元素生成稳定性不同的配合物。从而改变元素的电极电位,有利于提高电解精炼的分离效果。本工作以性质简单的一价元素银为对象研究了LiCl-KCl共晶熔盐中的银溴配合物的稳定性。首先,测定了844 K温度下LiCl-KCl中银(Ⅰ)的Nernst线性关系(图1),y=0.064x+0.037, In the process of spent molten salt electrolysis, the apparent electrode potentials of some spent fuel elements, such as uranium, plutonium, rare earth and minor actinide, are relatively close to each other, so that the separation and purification of these elements are less effective. If other molten salt anions are added to the molten salt other than the anions of the electrolytic solvents, the added anions will form complexes with different stability from these difficultly separated elements. Thus changing the electrode potential of the element, is conducive to improving the separation effect of electrolytic refining. In this work, the stability of silver-bromine complex in LiCl-KCl eutectic molten salt was studied with a simple elemental silver as a target. First, the Nernst linear relationship of silver (I) in LiCl-KCl at 844 K was measured (Figure 1), y = 0.064x + 0.037,