用于熔盐体系的氮化硼隔膜Ag/AgCl参比电极性能

介绍了熔盐中常使用的参比电极的性质和存在的问题，制得可用于高温氟化物盐中的氮化硼隔膜Ag/AgCl的参比电极，并对它的性能做了重点研究。确定了AgCl的物质的量分数为2%时较好，且需确保AgCl均匀地混合在LiCl-KCl熔盐中；该种参比电极在制备过程中应注意在各接口处严格密封，以减缓盐的蒸发和导线的腐蚀。对参比电极的性能做了评价，发现活化温度对活化时间有影响；温度变化对电位影响较小；参比电极的极化可逆性均良好；稳定性良好，但是受AgCl浓度、温度及光线的影响，长期使用电极的重现性较好。最终发现该参比电极性质稳定可长期连续（至少28 d）用于熔盐电化学实验中。

Performance of boron nitride membrane Ag/AgCl reference electrode used in molten salt

Characters and disadvantages of reference electrode used in molten salt were introduced.The boron nitride membrane Ag/AgCl reference electrode which can be used for high temperature molten fluoride salt was prepared and its performances were studied.The best amount-of-substance fraction of AgCl was 2%，and ensured that the AgCl was uniformly mixed in LiCl-KCl molten salt.In the preparation of the reference electrode，the interfaces should be strictly sealed，in order to reduce the evaporation of salt and weaken the corrosion of oxygen and water on the wire.The performance of the reference electrode was evaluated，it was found that the activation temperature effected on activation time.Temperature had little effect on potential.Polarization reversibility of the reference electrode was good.Stability of the reference electrode was good，but the performances can be influenced by AgCl concentration，temperature，and light.Reproducibility of the electrode was excellent for longer time use.Finally， it was found the reference electrode can be continuously used over a long period of time （at least 28 d） for molten salt electrochemistry experiment.